How Big Should a Cat Bed Be? | Sizing That Fits

Getting the size right comes down to one measurement: your cat’s length from nose to the base of the tail, not the tail tip. Add 4–8 inches (10–20 cm) of clearance so your cat can curl up and still stretch out. That math works for most cats, but breed, sleep style, and bed shape all shift the numbers.

Measure Your Cat the Right Way

Grab a soft tape measure while your cat is relaxed, ideally stretched out in a sleeping posture. Run it from the tip of the nose to the base of the tail—stop at the tail joint, not the tail tip. That base measurement is your starting point.

Add clearance based on how your cat sleeps:

• Curlers tuck into a ball and need less length—a donut or round bed works well smaller.
• Stretchers sprawl out fully and need a rectangular bed long enough for the whole body extended.

Kittens complicate the math. They grow fast, so size for the adult body length you expect, not the kitten in front of you.

Size by Breed and Body Type

Average adult domestic cats land around 18–22 inches (45–55 cm) nose-to-tail-base. That translates to an internal diameter of roughly 16–20 inches (40–50 cm) for round beds. Big breeds change the equation:

Maine Coons and Ragdolls routinely exceed 22 inches nose-to-tail-base, so a standard 20-inch bed leaves them cramped. For those breeds, look for beds at least 24 inches internal, and ideally larger. If you’re shopping for a big cat, our tested roundup of cat beds for large cats covers models built for that size range.

Internal Space Beats Outside Dimensions

Enclosed beds—caves, igloos, and hooded styles—have thick walls and small entrances that eat into usable space. A cave bed that measures 22 inches across the outside might offer only 18 inches inside. Always check the interior dimensions on the product listing, not the overall footprint.

The interior must also let your cat turn around and exit easily. A bed that’s technically long enough but has a narrow or awkward entrance will get ignored. Multi-cat households should consider whether two cats want to share—if they do, buy bigger or buy a second bed so nobody gets squeezed out.

When Bigger Isn’t Better

A too-large bed creates its own problem. Cats that like security prefer snug, den-like spaces where they feel enclosed on all sides. Dropping an 18-inch cat into a 30-inch open bed often means they sleep on the floor next to it instead.

The sweet spot: enough room to stretch, but not so much that the cat floats in open space. Watch your cat’s behavior after you set up a new bed. If they sleep in it regularly and change positions comfortably, the size works. If they circle and settle near the edge or avoid it entirely, the proportions are likely off.

FAQs

Should a cat bed be bigger than the cat?

Yes, but not by much. A bed should run 4–8 inches longer than your cat’s nose-to-tail-base measurement. That extra room lets the cat stretch without leaving so much open space that the bed feels unsafe. Curled sleepers can use a slightly smaller round bed, while sprawlers need full extension room.

What size bed does a Maine Coon need?

Maine Coons need a bed with at least 24–26 inches of internal length, and larger individuals may need 28 inches or more. Standard 20-inch beds are too short for most adult Maine Coons. Measure your cat nose-to-tail-base and add 4–8 inches to confirm the right size.

Do kittens need kitten-sized beds?

Not necessarily. Kittens grow rapidly, often reaching close to adult size within a year. Buying a kitten-sized bed means replacing it within months. Instead, buy a bed sized for the cat’s expected adult length, and let the kitten grow into it. A slightly larger bed also gives a growing kitten room to sprawl.