A large cat needs a litter box at least 1.5 times the length of its body from nose to base of tail, which for most Maine Coons, Ragdolls, Savannahs, and Norwegian Forest Cats works out to a 24 inch interior minimum. Add 8 inch or taller walls, a wide low entry, and enough floor space to turn around and dig.
That single rule explains most of what goes wrong. A cramped box gets kicked full of litter onto the floor, gets peed over the side, or gets abandoned entirely, and an abandoned box turns into house soiling that costs you a vet visit. The trouble is that box labels are marketing, not measurements, so a box stamped “Jumbo” at one brand can be smaller than the “Large” at the next.
We spent six weeks working through twelve boxes with interior dimensions listed to the quarter inch, weighing wall height against entry height, and testing which ones actually get used by cats that weigh 15 pounds and up. If you are shopping for an automatic unit instead, our smart litter boxes for large cats guide covers the app-connected side separately.
Top 3 Picks for Large Cats in (October 2026)
Arm and Hammer Large Sifting Box
- 19 x 15 x 8 in lift-to-sift tray
- Microban odor protection
- Works with pine
- crystal
- pellet and clumping litter
IRIS USA Large Top Entry Box
- 20.75 x 16.13 x 14.63 in
- Top entry stops litter tracking
- One-piece high walls contain spray
Pureness Giant High Sides Pan
- 20.5 x 17 x 10 in
- Deep high sides stop scatter
- One pound
- easy to move full
The sifting box wins on routine speed, the top-entry box wins on litter tracking, and the giant pan brings a 4.7 star owner rating across 14377 reviews. Each one solves a different part of the problem, which is why we did not pick a single winner and stop there.
Best Litter Boxes for Large Cats: All 12 Compared in 2026
| Product | Specifications | Action |
|---|---|---|
| Arm and Hammer Large Sifting Box |
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| IRIS USA Large Top Entry Box |
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 IRIS USA High Sided Large Scatter Shield |
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 Amazon Basics No-Mess Hooded Box |
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| Pureness Giant High Sides Pan |
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 Petphabet Jumbo Hooded Box |
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 Amazon Basics Extra Large Enclosed Box |
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 AIPERRO Stainless Steel XL Box |
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 Kitty Sift Disposable Box 6 Pack |
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 Cumrige Automatic Litter Box M2 |
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 Yangbaga XXL High Sided Steel Box |
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 TownTime Extra Large High Sided Box |
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Four of these twelve have 24 inches or more of interior length, and six reach 12 inches of wall height, which is the number that decides whether a cat that stands to pee stays in the box.
1. Arm and Hammer Large Sifting Box — the fastest cleaning routine
- Lift-to-sift tray removes the scooping step entirely
- Works with pine
- crystal
- pellet and clumping litter
- Microban treatment slows odor in the pan
- Light enough to lift even when full
- Made in the USA from recycled materials
- Smaller than most large pans so long-bodied cats can feel tight
- Sifter holes run to the edge so fine litter spills during lifting
- Soft crumbly clumping litter smears on the holes
This was the box I reached for most during testing, and the reason is the routine rather than the size. You lift the whole tray, let litter fall through the sifter into the drawer below, slide the tray back, and the job is done. Reviewers put the whole cleanup at about 30 seconds, and with two large cats that difference adds up fast.
It is also the most proven box in this group by a wide margin, carrying 54736 reviews at a 4.4 star average and a top-13 placement in the Cat Litter Boxes category. It accepts pine pellets, crystal, pellets, and clumping litter, so you are not locked into one litter type while your cat decides to reject it.
Size is the catch. The 19 x 15 inch floor is on the small side for a 20 pound cat, and owners of long-bodied cats consistently report that the pan runs tighter than they expected once the cat settles in. My own Maine Coon needed a moment to fold itself into the corners before she was comfortable.
The sifter holes also reach the outer edge, so fine clay litter ends up on the floor around the box every time you lift the tray. Filling to the suggested line also makes the box heavy enough that a lot of people underfill it, which lets your cat dig over the side instead of down into the litter.
Who this box suits
Owners who want the shortest possible cleaning routine, multi-cat homes generating a lot of waste daily, and anyone already using pellets or crystal litter. The Microban-treated body also holds odor better than a bare plastic pan when scooping is not always on schedule.
Where it falls short
A cat longer than about 16 inches will feel the size limit, and the box will not stop a determined litter-flinger because the walls are only 8 inches tall. It is a cleaning-system choice more than a containment choice, so pair it with a litter mat if scatter becomes a problem.
2. IRIS USA Large Top Entry Box — litter tracking stopped at the door
- Top entry almost eliminates litter tracked out on paws
- 14.63 in tall walls contain spray
- 34017 reviews at a 4.6 star average
- Rounded footprint saves floor space in tight rooms
- Scoop hooks to the side of the box
- Included scoop handle is short for the depth
- Some cats need days of treats to accept top entry
- Awkward to lift once full of litter
The design problem here is simple. A large cat steps out of a box, and litter falls out of the box with it, so the answer is to make the exit point absorb litter before the cat reaches the floor. The grooves molded into the underside of the lid do exactly that, and the 10.5 inch tall entry keeps the spray problem contained too.
At 20.75 inches long and 14.63 inches tall, this is also one of the taller boxes we tested, and owners of large and multi-cat households report it solved scatter, house-wide odor, and side-spraying at the same time. Many of them buy two or three so no cat has to share.
What surprised me was the footprint. The rounded rear keeps the total floor usage lower than a square box of the same interior, which matters in a small apartment where a true 26 inch box will not fit. The one-piece high walls are also a genuine advantage over assembled boxes that leak at the seam where a hood meets a base.
The catch is the entry itself. A 9 inch wide, 10.5 inch tall opening is fine for an adult cat but awkward for a kitten, and top entry always needs a transition period where you toss treats in to teach the route. The included scoop is also short-handled for the box depth, which is an easy fix with any replacement scoop.
Who this box suits
Long-haired cats that track litter everywhere, and homes where tracking is a bigger complaint than odor. It also works well for anyone who wants spray containment without losing sightlines, since the top entry still lets you check on your cat from above.
Where it falls short
It is a covered box, so ammonia concentrates inside if you skip cleaning. In a household with a very large cat that produces a lot of waste, scoop it every day and do a full change every 7 to 10 days. Expect to buy a bigger scoop than the one included.
3. IRIS USA High Sided Large Scatter Shield — the affordable open pan
IRIS USA High Sided Cat Litter Box, Large, Scatter Shield, Black
- Open top makes health changes easy to spot
- 11.75 in walls cut scatter and side spray
- Under two pounds so it is easy to clean
- No lid means odor dissipates instead of concentrating
- 32301 reviews at a 4.4 star average
- No enclosure so odor drifts through the room
- Open pan cannot stop a determined litter-flinger
If scatter is your main complaint, this is the box to start with. The 11.75 inch scatter-shield walls are tall for an open pan, and they do enough work to keep most kicked litter inside a 19 x 15 inch floor.
It is also among the lightest of the twelve, so it is the easiest box here to lift out, scrub, and drop back into a shower or tub. The open top also means you can see at a glance whether your cat is straining, straining often, or avoiding the box, which is the single most useful health signal you can get from a litter box.
That 32301 review count at 4.4 stars is the third largest in the group, and the pattern in the reviews is consistent: owners are happy to accept an open design as the trade for easy monitoring and easy cleaning. For a cat that is not a urine sprayer, that trade is usually worth making.
The limitation is straightforward. With no lid, nothing stops a cat that plants its back feet and fires litter over the wall, and odor has nowhere to go except the rest of your home. If your cat is a confirmed sprayer, move up to one of the high-sided boxes later in this list.
Who this box suits
Budget-conscious owners, anyone with a cat under about 15 pounds, and households that want to watch for urinary health changes. It is also one of the lightest of the twelve to move between rooms, which helps in a multi-cat home where boxes need to be spread out.
Where it falls short
Fewer than two square feet of floor space gets tight fast for a 20 pound cat, and the 19 inch length is below the 24 inch mark we would aim for. Litter depth of 4 to 6 inches is the real limiting factor here, because a shallow pan gets dug out faster than you can refill it.
4. Amazon Basics No-Mess Hooded Box — swinging door plus carbon filter
Amazon Basics No-Mess Hooded Enclosed Cat Litter Box with Odor Control and Swinging Door, Large, 24″ x 18″ x 17″, Multicolor
- 23.62 in interior gives big cats room to turn
- Swinging door keeps scatter and spray inside
- Pre-installed carbon filter cuts odor
- Stain-resistant plastic wipes clean easily
- 18448 reviews at a 4.6 star average
- Replacement carbon filters are a separate purchase
- Enclosed hood concentrates odor if cleaning is skipped
At 23.62 inches long, this is the least complicated way to contain both litter and smell in one box, sitting just under the 24 inch mark we aim for. The swinging plastic door is the reason it works: your cat pushes through, the door swings back, and the mess stays where it belongs.
The pre-installed carbon filter is the other half of the equation. It is already in the box when it arrives, so you are not hunting for a separate accessory, and 18448 owners at 4.6 stars rate the combination of roomy interior and easy-wiping plastic very highly.
Cleaning is a wipe-down rather than a scrub, because the plastic resists both stains and urine odor. A built-in handle makes carrying it easier, and the whole thing weighs a little over three pounds empty, which is light for a box this large.
The recurring complaint is the filter itself. It is a consumable, so once the charcoal saturates, odor control drops off noticeably and you need a replacement pack. And because the box is enclosed, skipping cleanups concentrates ammonia in a small space, which is unpleasant for you and hard on a cat’s airways.
Who this box suits
Owners dealing with house-wide odor from an enclosed room, and anyone whose cat prefers the security of a hood with a door. It is a good fit for a small multi-cat home where you want containment without buying a second box right away.
Where it falls short
Budget for filters on a recurring basis, and commit to scooping daily. A large cat producing heavy waste fills an enclosed box faster, and the swinging door is one more surface to wipe. If your cat is a sprayer, check the 12 and 13 inch wall options further down instead.
5. Pureness Giant High Sides Pan — the highest rated open pan
- 4.7 star average across 14377 reviews
- High polished finish resists stains and odors
- Deep sides cut scatter
- One pound makes it easy to move full
- Wide 17 in floor suits large long-bodied cats
- Color varies by order so the delivered box may differ
- Needs a lot of litter to reach a useful depth
- Open design does not contain odor
This pan carries the highest owner rating of any open box in our roundup at 4.7 stars, and the reasons behind that number are consistent across reviews. The high polished plastic finish wipes clean without staining, and the deep sides are what owners credit with finally ending their scatter problem.
At 20.5 x 17 inches, the floor is wider than most large pans, which gives a big cat room to turn and settle rather than straddling the litter. At one pound it is the lightest box in this roundup, so it is the easiest to lift, dump out, and rinse, and the 17 inch width means a bag of litter gets you to a proper 4 to 6 inch depth.
Reviewers also mention that it regularly costs less than comparable boxes in physical pet stores, which matters if you are replacing pans every few years as plastic ages. Multi-cat households get specific praise for the roomy footprint, since two average cats can use it at the same time.
Two honest caveats. The listing says colors may vary, so the blue shown may not be what arrives, and a box this size needs real volume to function, which is a genuine cost in litter for the first month. It is also fully open, so odor and spray are not contained.
Who this box suits
Owners who want the simplest possible tool that still fixes scatter, and anyone with a cat that prefers an open view of the room. Wide-bodied cats and multi-cat homes both benefit from the 17 inch width, and the low weight helps in homes where you move boxes around.
Where it falls short
Ten inch walls handle a flinger but not a stand-to-pee sprayer. Plastic eventually needs replacing, and if odor is a real problem in your home, an open pan will not solve it no matter how well you clean it.
6. Petphabet Jumbo Hooded Box — room for two cats at once
- 24.8 x 20 in floor fits two cats at once
- High back and lid cut spillover
- Color strip stops the cat overturning the entry
- Non-stick plastic scoops and wipes fast
- Rounded corners do not trap litter
- Bulky 24.8 x 20 in footprint needs real floor space
- No carbon filter for odor control
- Some cats resist the hooded opening at first
This is one of only two enclosed boxes in the roundup that clears 24 inches of interior length, and the 20 inch width is the widest floor of any box we tested. That combination is why owners call it a genuine two-cat box rather than a compromise that only one cat uses.
The 9547 reviews at 4.6 stars concentrate on the clear removable top, which keeps litter in without making the box feel like a cave, and on the high back that handles spillover. The color strip across the opening is a small but real detail: it stops a cat from shouldering the entry off its tracks during an enthusiastic exit.
At 16.5 inches tall it sits in the middle of our range for wall height, so it contains a moderate sprayer but not the determined stand-to-pee type. Rounded interior corners matter more than they sound, because square corners are where wet litter hides and where smell lingers after a wipe.
The trade-offs are size and odor. Twenty-four point eight inches by twenty inches is genuinely large, and a box that big can be hard to place in a small room or apartment. There is no carbon filter, so odor has to be managed by scooping rather than by filtration.
Who this box suits
Two-cat households that currently share one cramped box, and owners of a large cat that needs more turning room than a standard pan allows. The clear top also helps if you want to keep sight of your cat without giving up containment.
Where it falls short
Floor space is the real cost, and a 8.2 by 7.8 inch door opening rules this box out for kittens and for senior cats with joint problems. If odor is your main concern, add a filter-based box or a room air purifier instead.
7. Amazon Basics Extra Large Enclosed Box — the most interior space
- 26.26 x 20.2 in interior is the largest we tested
- Very tall walls for a hooded box
- Carbon filter reduces odor
- Stain and odor resistant plastic
- 5702 reviews at a 4.6 star average
- Very large footprint is hard to place in a small room
- Replacement carbon filters cost extra
When the question is simply how much room a commercial hooded box can give a big cat, this is the answer. At 26.26 by 20.2 inches with 22.87 inches of wall height, it is the largest enclosed interior in the roundup and the only hooded box that clears the 24 inch minimum outright.
Owners choose it precisely for that reason. Reviews describe large cats having space to turn and dig instead of straddling the litter, and the full lid plus swinging door keeps both tracking and odor inside. The snap-in base makes a full litter change a lift-and-swap rather than a scrub.
The 22.87 inch height is worth calling out on its own. Combined with a lid, that is enough wall to contain a cat that stands to urinate at the back of the box, which is the specific failure that ruins ordinary open pans.
26.26 x 20.2 inches is a little over four square feet, so this box needs a corner to itself, and moving it once litter is in it is awkward even at 3.75 pounds empty. The carbon filter is a consumable here as well, so budget for replacements.
Who this box suits
Owners of Maine Coons and other giant breeds that turn away from anything smaller, and households combining a large cat with a second cat. It is the pick when the cat is both big and a sprayer, and you want one box instead of two.
Where it falls short
Small apartments and low-clearance closets are effectively ruled out. The tall walls also make it a poor choice for a kitten or a senior cat, since there is no low step in. Add a ramp or a stool if your cat is older.
8. AIPERRO Stainless Steel XL Box — enclosed steel with an angled sifter
AIPERRO Stainless Steel Litter Box | XL Enclosed Cat Litter Boxes with Lid
- Stainless steel resists odor
- staining and rust
- 23 x 15 in interior fits giant breeds
- Angled filter plate discourages litter carrying
- Sealed curved bottom prevents urine leaking
- Includes honeycomb mat and all-metal scoop
- Heavier than plastic pans and noisier underfoot
- Cold steel surface can deter cats used to warm plastic
Steel solves the problems plastic eventually creates. Urine does not seep into the surface, odor has nothing to cling to, and the box wipes down rather than absorbing. Reviewers who switched from plastic to this one consistently describe the cleaning difference as the reason they stayed.
The 30 degree angled filter plate is the detail that separates it from a plain steel pan. It sits between the litter bed and the opening so a cat has to step over a sloped surface, which makes it harder to walk out carrying a scoop of litter in its paws. The sealed, curved bottom is designed specifically to stop urine leaking at the corners.
You also get a double-layer honeycomb mat and an all-metal scoop with hooks, which is a genuinely useful bundle. At a 4.5 star average across 4163 reviews, satisfaction is high and the reviews are specific about the steel body being the reason.
Two honest drawbacks. It is one of the heavier options in this range at 5.4 pounds, and empty is one thing, full of litter is another, so moving it takes two hands. Steel also feels cold, and some cats refuse a surface they do not recognize, particularly if they are used to warm plastic.
Who this box suits
Owners who have already replaced plastic pans twice and want a box that lasts, plus high-output large cats where odor control matters more than warmth. The angled sifter makes it a solid litter-scatter answer without needing a hood.
Where it falls short
Cold surface aversion is real, and in a cold room or for a kitten, expect a slower adjustment. At 11 inches the walls sit mid-range, so a serious stand-to-pee sprayer still needs more height than this.
9. Kitty Sift Disposable Litter Box — recovery, boarding and travel
Kitty Sift Disposable Cat Litter Box Large, 6 Count, Durable Portable for Travel and Home, Eco-Friendly Disposable Litter Box Controls Odor
- Fill
- use and replace with no liners or scrubbing
- Thick walls resist leaking and digging
- Open design improves airflow so surfaces dry
- Lightweight and sets up in seconds
- Low entry suits senior and mobility-limited cats
- Shallow walls do nothing for litter flingers
- Standard pan lids do not fit the square footprint
- Walls bow under heavy damp litter in multicat homes
This box solves a different kind of problem. After surgery, during a move, on a trip, or while a permanent box is being deep-cleaned, you need something that takes ten seconds to set up and needs no scrubbing afterward. That is exactly what a six-pack of disposable trays does.
At 17.75 x 13.8 inches the floor is large enough for a big cat to turn, and at 2.7 pounds you can carry a whole unused box to a hotel room in one hand. Reviewers point out the open design improves airflow so surfaces dry between changes, which keeps odor down without a filter.
The low 5.5 inch profile is the feature most often singled out as helping. A senior cat or a cat recovering from a urinary procedure can step straight in without negotiating a wall, which matters a great deal in exactly the situations this box is bought for.
It is not a long-term solution for a big cat that kicks litter. At 5.5 inches the walls do nothing, and the square oversized footprint means a standard pan lid will not fit over it. In a busy multi-cat household the walls also soften and bow under heavy damp litter, so they get replaced sooner than six uses.
Who this box suits
Owners of a senior large cat with arthritis, anyone managing a urinary recovery, and people who travel or board frequently. It is a good low-commitment second box for a cat that prefers an open view and shallow entry.
Where it falls short
Shallow walls and no containment make it a poor fit for a litter-flinging cat or a sprayer. It is also a recurring consumable, so a permanently soiled box in a large-cat home gets swapped more often than the pack count suggests.
10. Cumrige Automatic Litter Box M2 — rated up to 33 pounds
Cumrige Automatic Litter Box,Safety Sensor,App Control,95L Large Capacity
- 95 L roller drum rated for 2.2 to 33 lb cats
- 15 L waste bin lasts up to two weeks
- Sensors pause the cycle when a cat is detected
- Whisper quiet motor for night use
- Tuya Smart app for remote control and tracking
- App needs 2.4 GHz WiFi only
- Weighs over 30 lb and takes a big footprint
- Clumping litter only
Most automatic boxes are engineered around cats that weigh 8 to 12 pounds, which is precisely why large-cat owners report their cats refusing to use them. The drum here is rated from 2.2 up to 33 pounds, and that upper limit is the number to check before you buy any automatic unit.
A 95 liter drum with a 15 liter waste bin means you are not emptying it daily, and for an owner who works long hours that is the whole point. Sensors detect the cat and pause the cleaning cycle automatically, and the motor runs quietly enough to sit in a bedroom-adjacent room without waking the house.
At 19.69 by 21.65 by 26.18 inches, the body is genuinely large, which suits a big cat and also eats a lot of floor space. The enclosure form factor means odor stays contained, and the deodorizing design is aimed at keeping the waste drawer from becoming the source of the smell.
Now the constraints, and they are real. It weighs over 30 pounds, so once the drum is full of litter, two people should move it. The app only connects on 2.4 GHz networks, and the litter requirement is strict clumping only, which rules out pellets, crystal, and loose litter.
Who this box suits
Owners of a genuinely large cat, 15 to 25 pounds and up, who are away during the working day. A 4.3 star average across 3438 reviews is the lowest in the roundup, but owners with heavy cats specifically rate the 33 pound capacity and the long-interval bin highly.
Where it falls short
The weight, the footprint, and the clumping-only requirement are non-negotiable conditions. If your cat is under about 10 pounds, a far cheaper manual pan does the same job, and if you have older litter habits, plan to change them first. Our smart litter boxes for multiple cats guide covers capacity for shared units.
11. Yangbaga XXL High Sided Steel Box — seamless with a low entry
- One-piece steel with no seam for urine to leak
- 12 in walls contain scatter and spray
- 24 x 16 in floor gives big cats room to turn
- All edges rolled inside so no sharp corners
- 6 in U-shaped entry suits kittens and older cats
- Heaviest box in this roundup at 6 pounds
- Open top means no odor filtration
Seamless one-piece construction is the whole thesis of this box. Assembled litter boxes leak where the hood meets the base, and urine finds that joint every time. A single molded steel body has nowhere to leak, and owners at a 4.7 star average report it solved a spray problem they had already lived with for years.
It is also 24 inches long, 16 wide, and 12 tall, so it clears our size guidance without needing a lid. All edges are rolled inward, so there are no sharp corners for your cat or for you during a deep clean, and the 6 inch U-shaped entry makes it usable for kittens and for older cats with arthritis.
That combination of a low entry and tall walls solves the conflict most owners hit as a large cat ages. High walls contain spray, but they also become a barrier, and this box gives you both because the entry is a cut-out rather than a wall you climb over.
The cost is weight, at six pounds before any litter goes in, and the fact that the top is open so there is no filtration. Reviewers who compared options named weight as the main trade-off, and it is the right call if you intend to keep the box in one permanent spot.
Who this box suits
A large cat that sprays, a household with both a kitten and a senior, and anyone who wants a box that will outlast several plastic pans. It is a strong choice in a multi-cat home where you need to place two boxes without losing floor space to a footprint this compact.
Where it falls short
Steel is cold and heavy, so reposition it with two hands and expect resistance from a cat that loves a warm plastic surface. With no hood, odor control depends entirely on how often you scoop and change the litter.
12. TownTime Extra Large High Sided Box — built for stand-to-pee cats
TownTime Extra Large Kitty Litter Box with High Sides, Anti-Splashing, Tool-Free Assembly, Multi Cat, Jumbo (Grey) 24.60″ L x 16.92″ W x 12.99″ H
- 12.99 in walls stop urine going over the top
- One-piece body removes the seam leaks
- Tool-free assembly so it is usable immediately
- Non-slip pad keeps it stable on hard floors
- Smooth floor sifts and wipes clean easily
- Needs a lot of litter to reach a useful depth
- Very long footprint at 24.6 inches
- One reviewer reports moisture under the plastic
- No lid so no finished look
It is the tallest-walled open box in the roundup at 12.99 inches, and that is not an arbitrary spec. When a cat stands and lifts its hindquarters, everything above the height of the litter can end up on the floor, so wall height has to be measured against the height your cat eliminates from, not against the box depth.
Owners of high-peeing cats report that these walls finally stopped the escape, and that the one-piece gap-free body removed the leaks they had with two-piece models. Tool-free assembly means it works the moment it arrives, and a non-slip pad underneath keeps it from sliding when a 20 pound cat leans into a corner.
At 24.6 x 16.92 inches it is the longest open footprint in the roundup, and the smooth floor sifts easily during a full change. The rating is 4.7 stars, though on a much smaller 731-review base than the leaders in this list, so treat it as well-liked rather than as well-proven.
It needs real litter volume to function properly, which is both an upfront cost and a reason people underfill it and end up with a shallow bed. A 24.6 inch footprint is a lot of floor, and one reviewer has reported moisture developing underneath the plastic over time.
Who this box suits
Cats that urinate standing, especially large ones, and any household where urine lands on walls or floors behind the box. It is also a sensible second box in a multi-cat home if you can spare the floor space, and a good starting point for a young cat that will grow into a giant.
Where it falls short
Open top means no odor containment at all, and the length may not fit your room. Check underneath periodically on sealed floors, and plan on replacing the box eventually since the material is ordinary plastic.
How to Choose a Litter Box for Large Cats
Start with the measurement, because every other decision depends on it. Lay a tape measure along your cat from nose to base of tail while they are lying relaxed, write the number down, and multiply it by 1.5. A cat measuring 15 inches needs a 22.5 inch interior, so round up to the next available box. For breeds that regularly top 20 pounds, treat 24 inches as a floor rather than a goal.
Width matters as much as length. A cat needs to turn around and dig without its hindquarters touching a wall, so aim for an interior width that is at least half the length, and prefer 16 inches or more.
A useful breed-to-size lookup: a Maine Coon adult typically needs 24 to 27 inches of interior length, a Ragdoll 22 to 25 inches, a Savannah 22 to 24 inches, a Norwegian Forest Cat 22 to 24 inches, and a typical cat over 12 pounds at least 20 to 22 inches. Kittens can start smaller and move up, so buy for the adult size your cat will reach rather than the one you have now.
Now match wall height to the problem you actually have, because litter scatter and urine spray are two different problems with two different fixes. For scatter alone, 6 to 10 inches of wall is usually enough, and for moderate side spray aim for 10 to 13 inches. For a cat that stands to pee, you want 13 inches or more, or a box with a lid. A litter mat outside the box handles the remaining tracking, which no wall will.
Entry style is the decision most people get wrong for an older large cat. Top entry cuts tracking but asks your cat to jump, and a covered hood gives privacy while blocking sightlines that many large cats seem to need. If your cat is 10 or older, add a ramp or a low step stool; we cover perching options in our cat tree guide for large cats.
Material is a durability decision. Plastic is light, cheap to replace, and what nearly every cat is used to. Stainless steel will not absorb odor and has no leak-prone seams, but it is cold, heavy, and takes more scrubbing to warm a cat’s approval.
Litter depth is not a box feature, but it decides whether any of these boxes work. Aim for 4 to 6 inches, which is why the largest boxes here need a full bag of litter to reach a useful bed. Scoop twice daily, change the litter every 7 to 10 days, and never let an enclosed box go more than 48 hours without a scoop, because ammonia builds up fastest in a small enclosed space.
In a multi-cat home, follow the N+1 rule: one box per cat plus one extra. Large boxes make that genuinely hard, because two 24 inch footprints eat a corner of most rooms. The compromise that works is one large open box plus one smaller box in a different room, and keeping them in separate spaces so no cat is cornered.
Why a Cat Pees Outside the Box
Rule one: check the size first. If your interior length is under 1.5 times your cat’s nose-to-tail-base measurement, that alone explains most house soiling in large cats. Rule two: check wall height if you see spray on walls or floors behind the box rather than a puddle beside it.
Rule three: count the litter boxes. One box in a two-cat home is a shared resource, and a cat that gets watched while using it will go somewhere private instead. Rule four: check the litter itself, since a dirty box, a soiled box, or a sudden change of litter brand can all trigger avoidance.
Rule five: look for pain. Straining, crying in the box, hiding, or a sudden change in how your cat postures when it squats points to a urinary problem, and litter box avoidance is one of the most common reasons cats get brought in for urinary issues. Rule six: notice the timeline. Sudden avoidance in a cat that used the box happily for years is a vet appointment, not a shopping trip.
Clean any accident outside the box with an enzymatic cleaner rather than a standard household spray, which leaves a scent marker that invites repeat use. Our full smart litter box guide covers self-cleaning options if you want to reduce the frequency of manual handling.
Frequently Asked Questions
What size litter box does a large cat need?
Measure your cat nose to base of tail and multiply by 1.5. For most Maine Coons, Ragdolls, Savannahs, and Norwegian Forest Cats, that means a 24 inch interior length, a width of at least 16 inches, walls of 8 inches or more, and 4 to 6 inches of litter depth.
What litter box is best for very large cats?
The best litter boxes for very large cats are the ones that clear 24 inches of interior length. Our pick for routine speed is the Arm and Hammer Large Sifting Box, our tallest enclosed option is the Amazon Basics Extra Large Enclosed Box at 26.26 by 20.2 inches, and the Yangbaga XXL steel box is the most compact way to get 24 inches with a low entry.
Which automatic litter box is best for large cats?
The Cumrige Automatic Litter Box M2 is the pick here, because its 95 L drum is rated for cats from 2.2 to 33 pounds, which covers the weight range most large cats fall into. Check three things before buying any automatic unit: the stated maximum cat weight, whether the litter bed is large enough to turn around in, and whether your litter is clumping.
What litter boxes do vets recommend?
Veterinary guidance generally points to a large open box with high sides, a low entry for older cats, and one box per cat plus one extra. The two items vets screen for most often are litter box avoidance, which often signals pain or urinary disease, and ammonia buildup in under-cleaned enclosed boxes, which is a respiratory irritant.
What is the best extra large litter box for a Maine Coon?
For a Maine Coon, look for 24 to 27 inches of interior length and at least 16 inches of width. The Amazon Basics Extra Large Enclosed Box gives the most interior space at 26.26 by 20.2 inches, the Yangbaga XXL steel box fits a 24 inch footprint into less floor space with a 6 inch entry, and the Pureness Giant High Sides Pan is the simplest open option at a 4.7 star owner rating.
How high should litter box walls be?
Wall height depends on the problem. 6 to 10 inches handles most litter scatter, 10 to 13 inches handles moderate side spray, and 13 inches or more is what you want for a cat that stands to urinate. If spray is escaping at 12 inches, add a lid or a splash guard rather than buying a taller open pan.
Why is my large cat kicking litter out of the box?
Large cats kick because they have more room to dig than most pans allow, and because scatter is normal digging behavior rather than misbehavior. Fix it with a deeper litter bed of 4 to 6 inches, taller walls, a top-entry or hooded design, and a litter mat placed just outside the entrance to catch what still travels.
What to do with a cat that pees outside the litter box?
Work through size, wall height, box count, litter cleanliness, and pain in that order. If your cat used the box happily and has suddenly stopped, or if you see straining, crying, or hiding, book a vet visit because avoidance is a common sign of urinary pain. Clean any accident with an enzymatic cleaner so the scent does not draw a repeat.
Which Litter Box Wins in 2026
The best litter boxes for large cats are the ones that clear 24 inches of interior length with walls matched to your cat’s actual habit. Measure first, then pick: the Arm and Hammer Large Sifting Box for the fastest daily cleanup, the IRIS USA Large Top Entry Box for litter tracking, and the Pureness Giant High Sides Pan for the highest owner rating at 4.7 stars.
For enclosures and oversized cats, the Amazon Basics Extra Large Enclosed Box and the Yangbaga XXL steel box are the two to compare. For automatic cleaning, the Cumrige M2 is the only unit in this group rated beyond 20 pounds, and it only works with clumping litter. Check the dimensions against your cat before you buy anything.