IRIS USA XX Large Litter Box Review (2026): Finally Enough Room for a Big Cat

Standard litter boxes are often too small for larger cats to comfortably turn around and dig in, which is exactly the problem this IRIS USA XX Large box solves. After switching a larger adult cat over from a standard sized box, the difference in how much litter stayed inside the box instead of on the floor was immediate.

Who it's for

This is built for larger cats, multi cat households sharing one box, or anyone dealing with litter scatter from a cat that digs enthusiastically. Households with very limited bathroom or utility space may find the larger footprint harder to fit compared to a standard sized box.

What we liked

• The extra length and width gives larger cats real room to turn around and dig without their body hanging over the edge.
• The high sided scatter shield noticeably reduced litter kicked onto the surrounding floor compared to a standard low sided pan.
• The open top design makes daily scooping simple, without needing to reach through a small covered opening.

What could be better

• Its larger footprint takes up noticeably more floor space than a standard box, which matters in smaller bathrooms or laundry rooms.
• Being open top, it doesn't contain odor as well as a fully enclosed box.

Key specs, explained

The high sided scatter shield design raises the walls higher than a typical open litter pan specifically to catch litter that gets kicked during digging and covering, which is one of the most common sources of mess around a litter box. Sizing at 30 by 20 inches gives noticeably more usable interior space than the roughly 18 by 15 inch footprint of many standard litter pans, which matters most for larger breeds or multi cat households sharing one box.

Frequently asked questions

Q: Will this fit where a standard litter box currently sits? Measure your space first, since the larger footprint won't fit everywhere a standard box does, particularly narrow bathroom corners.

Q: Is it suitable for kittens? The high sides that help contain scatter can also make entry harder for very young kittens, so a lower sided box may be better until they're a bit older.

Should you buy it?

For a larger cat or a household tired of cleaning scattered litter off the floor, the extra size and scatter shield make a real difference.

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