How to Choose the Right Dog Crate Bed Size? | Fit by Inside Floor

For the full breakdown, see our best Dog Crate Bed guide.

Choosing the right dog crate bed size comes down to one measurement: the usable floor space inside the crate. Most owners grab a bed based on the crate’s label—a “36-inch crate” sounds like it needs a 36-inch bed—but that’s exactly where sizing goes wrong. The bed has to fit the interior footprint, which is always smaller once you account for the pan, the lip, and the walls. Get that one number right and the rest of the selection falls into place.

Measure The Interior Floor First

Open the crate door and measure the inside from wall to wall, both length and width. Use the floor surface itself, not the top of the frame. If your crate has a removable plastic pan, measure inside that pan, because that’s the actual surface the bed will sit on. A bed sized to the crate’s exterior will be too large and will bunch up against the walls.

The sizing charts from PetMD and Hill’s Pet both point to the same method: measure the interior and match the bed to that floor space. For a quick reference, common crate-bed sizes track with crate lengths of 18, 24, 30, 36, 42, and 48 inches. A bed built for a 24-inch crate typically measures around 18 inches deep by 24 inches wide.

Match Bed Size To Crate Length

Here’s the standard mapping most manufacturers use, with the approximate pad dimensions you’ll see on product listings:

These aren’t universal, but they’re the common pattern. Some manufacturers size differently—PetSmart’s kennel bedding chart notes that a G-1 Medium Kennel (25″ x 18″) fits a Small bed, while a Large Kennel (35.75″ x 22″) needs a Medium bed. Always check the specific product’s sizing chart rather than assuming the crate length equals the bed size.

Leave Room For Comfort And Bed Thickness

Thickness matters more than most owners expect. A thick, plush bed can raise your dog’s sleeping surface by 3 or 4 inches, which reduces the effective height of the crate. A too-thick bed can also make it hard for older dogs to climb in and out.

Common Sizing Mistakes To Skip

The three errors that cause most returns: measuring the outside of the crate instead of the inside floor space, ignoring the pan and lip that shrink the real footprint, and choosing a bed purely by your dog’s weight. Weight-based charts are a shortcut that works only when tied to your dog’s actual length and your crate’s interior dimensions—a heavy, short dog needs a very different bed than a light, long-bodied one.

When you’re ready to buy, see our roundup of the best dog crate bed options to compare sizes and materials side by side.

FAQs

Should the bed be the same size as the crate?

No. The bed should match the crate’s interior floor dimensions, which are always smaller than the exterior. Most manufacturers size their crate beds to the usable inside space, so a “36-inch crate bed” is meant for the floor of a 36-inch crate, not the crate’s outer length.

What if the bed is slightly too big for the crate?

Even a slightly oversized bed will wrinkle and bunch against the walls, and it can reduce the usable space your dog needs to turn and stretch. If the bed is too thick, it also raises the sleeping surface and shrinks headroom. Return it and size down rather than forcing it to fit.

Can I use a regular dog bed inside a crate?

Yes, as long as it fits the interior measurements. Regular beds are often thicker and less flexible than crate-specific pads, so measure carefully and leave room for your dog to stand and move. Add roughly 4 inches of allowance to length and width for the bulk of a thicker bed.