What Size Dog Bed Do I Need? A Measuring Guide

Buying a dog bed by the label (small, medium, large) is how a lot of people end up with a bed their dog will not use. Those labels are not standardized, and a "large" from one maker can be a "medium" from another. Measure instead. It takes a minute.

The measurement

Wait until your dog is asleep and fully stretched out on their side, legs extended. Measure from the tip of the nose to the base of the tail.

Then add roughly 8 to 12 inches. Treat that as a rule of thumb for the minimum sleeping-surface length, not an exact standard.

Measuring a curled-up dog is the classic mistake. Most dogs stretch out at some point in the night, and a bed sized to their curled shape can leave elbows and hips on hard floor.

Watch for the bolster trap

On bolstered beds, the listed dimensions often describe the outer footprint, not the sleeping surface. Depending on how thick the bolsters are, a 36-inch bolstered bed might have closer to 26 inches of usable interior.

Check the internal sleeping area whenever it is listed. If it is not, don't assume the whole footprint is usable: bolsters can take several inches off each side, so choose a size with room to spare.

Size by sleeping style, not just length

• Sprawlers need generous width as well as length. Consider going up a size.
• Curlers can use a smaller footprint efficiently, such as a donut bed, but still need room to stretch when they change position.
• Leaners need at least one raised side to press against.
• Multi-dog households where dogs share should measure both dogs lying side by side, not add their individual sizes.

Not sure which one your dog is? The way a dog sleeps says more than you'd think, and if your dog burrows or seems anxious, Calming Dog Beds: Why Anxious Dogs Burrow covers which shape suits which sleeper.

Thickness matters as much as footprint

A large dog on a thin bed is effectively on the floor. As a loose starting point (not a standard):

• Under 50 lb: 3–4 inches
• 50–90 lb: 4–6 inches
• Over 90 lb: 6 inches or more

The better check is the bed itself. Press down hard in the center with your fist. If you feel the floor, the bed is too thin or too soft for that dog. This matters most for seniors, large breeds, and any dog with joint issues, where years of pressure on elbows and hips can contribute to calluses and discomfort.

Buying for a puppy

Consider an inexpensive, washable bed now and a better one later. Puppies chew beds, have accidents on them, and outgrow them. Many puppies also settle better in a bed that fits them now than in a large, mostly empty bed sized for their adult dimensions. For more on getting a puppy to settle, see how a pillow-top dog bed can help a pup's bad sleeping habits.

Signs the bed is the wrong size

• Your dog sleeps on the floor next to it
• Limbs consistently hang off the edge
• They use it as a pillow rather than lying on it
• They circle repeatedly and never settle
• They prefer the sofa, which can be a size or support issue rather than a preference for furniture

When to replace

Press the spot your dog uses most. If it does not spring back within a few seconds, the fill has lost its support and the bed is functionally a mat. Solid foam generally holds its shape longer than loose fiber fill, which can flatten quickly under a big dog.

Browse Beds & Blankets, including Pillow Beds and Burrow Beds, and compare each size's listed measurements against your dog's.