A standard litter box is a tight squeeze for a 20-pound Maine Coon. Your cat ends up crouching, missing the pan, or scattering litter everywhere. An undersized box creates daily cleanup battles and lingering odors that plastic simply cannot contain.
I’m Mohammad Maruf — the founder and writer behind WellFizz. I’ve analyzed hundreds of litter box specs, pore over customer reports on odor absorption and urine leakage, and compare measurable dimensions like interior floor space and sidewall height to find the best fit for large-breed cats.
After reviewing dozens of models, I’ve narrowed the field to seven that genuinely accommodate larger frames, reduce mess, and simplify maintenance. This guide walks you through exactly what to look for so you can confidently choose the best cat litter box for large cats that keeps your home clean and your cat comfortable.
How To Choose The Best Cat Litter Box For Large Cats
A box that works for a 9-pound kitten will fail a 20-pound Ragdoll. Large cats need more than just a bigger pan — they need specific dimensions, materials, and entry styles that prevent mess and encourage consistent use.
Measure Interior Floor Length and Width
A large cat should be able to turn around fully inside the box. For a cat that is 18 inches long (nose to tail base), you want a floor that is at least 24 inches long and 16 inches wide. That space lets them position themselves without crowding the walls, which reduces accidental urination over the edge.
Prioritize Deep Sidewalls
High-peeing males and cats that dig vigorously need walls at least 10 to 12 inches tall. Sidewalls that are too short allow urine to splash out and litter to scatter across the floor. Extra-high walls also provide a sense of privacy for cats that dislike fully covered boxes.
Choose Stainless Steel Over Plastic
Plastic is porous. Over time, it absorbs urine odors that daily scooping cannot remove. Stainless steel is non-porous, scratch-resistant, and does not trap smells. It also rinses clean with just water and a cloth, making it the most hygienic material for any multi-cat or large-cat household.
Decide Between Open, Covered, and Top-Entry
Open pans offer the easiest access for senior cats and the fastest scooping. Covered boxes contain odors and provide privacy, but require enough interior height for a big cat to stand. Top-entry designs stop scatter and keep dogs out, but demand that your cat can jump in and out comfortably.
Quick Comparison
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| Model | Category | Best For | Key Spec | Amazon |
|---|---|---|---|---|
| Pematar XXL | Stainless Steel Covered | Large to extra-large single cats | 26″ L x 18″ W x 12″ H | Amazon |
| URPOWER XL | Stainless Steel Covered | High-peeing cats, dual-entry | 23.8″ L x 17.3″ W x 15.2″ H | Amazon |
| LIHONG XL | Stainless Steel Pan | Senior cats, low-entry access | 23.5″ L x 15.5″ W x 8″ H | Amazon |
| FUTAM XL | Stainless Steel Covered | Budget-friendly, multi-cat | 23″ L x 14.6″ W x 10″ H | Amazon |
| EGMEHOAD XXL | Stainless Steel Pan | Deep litter capacity, 8″ deep | 23.6″ L x 15.7″ W x 8″ H | Amazon |
| TownTime Jumbo | Plastic Pan | Tall cats, open design | 24.6″ L x 16.9″ W x 13″ H | Amazon |
| KMNSUN XXXL | Stainless Steel Pan | Giant breeds, multiple cats | 28″ L x 20.5″ W x 14″ H | Amazon |
In‑Depth Reviews
1. Pematar XXL Stainless Steel Cat Litter Box with Lid
At 26 inches long and 18 inches wide, the Pematar XXL provides one of the largest stainless steel footprints without jumping to an industrial size. The 12-inch sidewalls are high enough to stop standing urination from escaping, and the overlapping seam design prevents liquid from seeping through the corners — a common failure point on plastic boxes.
The included lid adds privacy for cats that prefer a covered feel, and the stainless steel pan rinses completely clean with no lingering odor. Owners of 20-pound cats report their pets can turn around and dig without touching the walls. The dark gray finish hides smudges better than lighter metals.
This box includes a litter scoop and a non-slip bottom pad. It requires minimal assembly for the lid attachment. For multi-cat households with one very large cat, this size hits the sweet spot between generous interior space and manageable footprint.
Why it’s great
- 26-inch length fits cats up to 20 pounds comfortably
- 12-inch overlapping walls prevent urine leakage
- Stainless steel does not retain odors between cleanings
Good to know
- Requires more floor space than standard boxes
- Lid assembly takes a few minutes
2. URPOWER XL Stainless Steel Cat Litter Box with 110° Flip-Top Lid
The URPOWER XL stands out with its 110-degree flip-top lid that lets you scoop without removing the entire cover. That single detail saves time on daily maintenance. The fully-enclosed mode traps odors inside, and the semi-enclosed mode boosts ventilation for cats that dislike feeling trapped.
Made from 304 stainless steel with an ABS frame, this box measures 23.8 by 17.3 inches with a total height of 15.2 inches — enough room for an 18-pound male cat to enter through the front or top. The included bamboo charcoal deodorizing compartment adds passive odor absorption between scoops.
Testers noted that the matte black exterior shows dust and litter dust more readily than lighter colors. The scoop and mat are included. Some cats initially resisted the lid, but most adapted within a few days. For owners wanting a covered box without sacrificing easy scoop access, this is a strong mid-range contender.
Why it’s great
- Flip-top lid eliminates removing the cover to scoop
- Two entry modes: fully enclosed or semi-open
- Deodorizing compartment for bamboo charcoal bags
Good to know
- Black finish shows dust and litter tracking
- Some cats may need time to accept the lid
3. LIHONG XL Stainless Steel Cat Litter Box
With an 8-inch wall height and a 23.5 by 15.5 inch interior, the LIHONG XL does not offer the tallest sides in this lineup, but it is specifically designed for senior cats or those with mobility issues. The low entry height makes stepping in easy, and the stainless steel surface cleans up with a simple rinse.
The rubber-padded feet on each corner keep the box from sliding on hard floors and prevent scratches underneath. Owners of 15-pound cats reported that the space is adequate for turning around, though longer-bodied cats may prefer a longer pan. The smooth, rounded edges protect both paws and hands during handling.
This pan is best for households where the large cat is older or arthritic. The modest sidewalls mean some litter scatter is inevitable with an enthusiastic digger, but the stainless steel material eliminates the odor retention that plagues plastic pans after just a few months of use.
Why it’s great
- Low entry height ideal for senior or arthritic cats
- Rubber feet prevent slipping and floor scratches
- Stainless steel is rust-proof and odor-free
Good to know
- 8-inch walls may not contain high-peeing cats
- Some litter scatter expected with deep diggers
4. FUTAM XL Stainless Steel Litter Box with Lid
The FUTAM XL is a solid entry-level stainless steel option that comes complete with a lid, litter scoop, and a double-layered tracking mat. The 10-inch sidewalls are a step up from standard pans, and the wrapped corners help contain urine that would otherwise seep through seams in cheaper designs.
The lid features a safety buckle that locks it tight to the pan — a thoughtful detail for cats that like to push against the cover. Inside, the 23 by 14.6 inch floor accommodates a 15-pound cat without crowding. The 20-liter litter capacity reduces refill frequency, lasting about 30 days for a single adult cat.
Owners noted that the included plastic scoop feels flimsy compared to the steel pan itself. Plan to upgrade to a metal scoop separately. For the price, this package delivers good value, especially for first-time stainless steel buyers who want a complete starter kit.
Why it’s great
- Includes lid, scoop, and anti-tracking mat
- Safety buckle locks lid in place
- 10-inch walls improve containment over standard pans
Good to know
- Included scoop is lower quality than the pan
- 14.6-inch width may feel snug for heavier cats
5. EGMEHOAD XXL Stainless Steel Litter Box, 8″ Deep
The EGMEHOAD XXL is built for owners who prefer a deep pan without a lid. At 8 inches tall, the sidewalls are moderate, but the stainless steel construction prevents the scratches and odor absorption that plague plastic pans of similar depth. The 23.6 by 15.7 inch floor fits cats up to 15 pounds comfortably.
The rounded corners and reinforced edges make it easy to grip when emptying, and the smooth surface rinses clean without scrubbing. Multiple customers with six-cat households reported that even with heavy use, the steel does not retain smell. The pan is lightweight at 3.4 pounds, making it simple to carry to the cleaning station.
This box comes without a lid, scoop, or mat. It is a straightforward pan — nothing extra. If you want a simple stainless steel replacement for a plastic box that has become permanently smelly, this fits the bill without paying for accessories you may already own.
Why it’s great
- Lightweight 3.4-pound pan for easy handling
- Corrosion-resistant steel eliminates odor retention
- Rounded edges protect hands and paws
Good to know
- No included scoop, mat, or lid
- 8-inch sides may not stop high-peeing cats
6. TownTime Extra Large Cat Litter Box with High Sides
The TownTime Jumbo is the only plastic pan in this lineup, but it earns its spot for one reason: the 13-inch sidewalls. That height is higher than most stainless steel pans in a similar price tier, making it ideal for tall cats that stand while urinating. The 24.6 by 16.9 inch floor gives ample turning room.
The polypropylene construction is durable and resistant to cracking, and the one-piece design means no assembly. The anti-scatter lip at the top reduces litter kick-out. Owners of 17-pound cats reported that this box solved their overspray problem immediately.
Plastic does have drawbacks. Over time, it will absorb odors and develop scratches that trap bacteria. This box makes sense as a temporary solution or for owners who prioritize extreme sidewall height above all else. If you choose this route, expect to replace it within 12 to 18 months.
Why it’s great
- 13-inch sidewalls are among the highest available
- One-piece design requires zero assembly
- Spacious floor fits multiple cats
Good to know
- Plastic absorbs odors and scratches over time
- Not as hygienic as stainless steel for long-term use
7. KMNSUN XXXL Stainless Steel Litter Box, 28″ x 20.5″ x 14″
At 28 inches long, 20.5 inches wide, and 14 inches tall, the KMNSUN XXXL is the largest box in this review. It is designed for giant breeds like Maine Coons and for multi-cat households that want to consolidate down to a single pan. The floor area gives even a 25-pound cat room to circle and dig without contacting the walls.
The 14-inch sidewalls are the tallest in this lineup, effectively eliminating urine spray from even the highest-peeing males. The stainless steel pan snaps onto the removable sidewalls with a secure fit — no tape or clips required. The included multi-layer mat catches up to 90 percent of tracked litter.
The trade-off is a significant footprint. This box takes up about 4 square feet of floor space, and the initial litter fill is substantial. For owners of a single large cat or multiple cats who want a one-box solution, this is the definitive choice for containment, odor control, and ease of cleaning.
Why it’s great
- 28-inch length and 14-inch walls accommodate the largest cats
- Snap-on sidewalls require no tools for assembly
- Included mat catches majority of scattered litter
Good to know
- Very large footprint requires dedicated floor space
- Requires a high volume of litter for initial fill
FAQ
What size litter box does a 20-pound Maine Coon need?
Is stainless steel really better than plastic for odor control?
Can a large cat use a top-entry litter box comfortably?
How often should I fully clean a stainless steel litter box?
Final Thoughts: The Verdict
For most owners, the cat litter box for large cats winner is the Pematar XXL because it balances a roomy 26-by-18-inch footprint with 12-inch stainless steel walls that stop leaks and neutralize odors without dominating your floor plan. If you have a high-peeing cat that needs a covered box with easy scoop access, grab the URPOWER XL. And for giant breeds or multi-cat homes where nothing less than maximum containment works, the KMNSUN XXXL with 14-inch walls and a 28-inch pan delivers the ultimate no-mess solution.
Mo Maruf
I created WellFizz to bridge the gap between vague wellness advice and actionable solutions. My mission is simple: to decode the research and give you practical tools you can actually use.
Beyond the data, I am a passionate traveler. I believe that stepping away from the screen to explore new environments is essential for mental clarity and physical vitality.