Dog Bed & Crate Size Finder
Find the right bed or crate size for your dog using practical measurements, sleeping preferences, and product dimensions.
- Practical, step-by-step measuring
- Matching products with affiliate links
- Clear size rules, no sign-up
Enter Your Dog’s Details
Nothing you enter is saved or sent anywhere. It all runs in your browser.
Recommended Sizes
Pick bed or crate, then see the minimum size for your dog.
Enter your dog’s length and height, then press “Find My Dog’s Best Fit” to see your recommended minimum size.
Quick size guide
- Compare against the internal (sleeping area) dimensions, not the outside size.
- If your dog likes to stretch out and is between sizes, choose the larger bed.
- For curlers, a round bed with a rim close to the minimum is usually enough.
Matching Products
Affiliate disclosure: as an Amazon Associate I earn from qualifying purchases, at no extra cost to you. Read our full affiliate disclosure.
Calculate your dog’s size to see products whose recorded dimensions match.
How to Measure Your Dog
- Length: base of tail to base of neck.
- Height: floor to top of head, standing.
- Sleep style: watch how your dog naps.
Why the Right Size Matters
- Room to stretch out or curl up
- A crate big enough to stand, turn and lie down
- Fewer returns and wasted money
- A calmer start to crate training
Frequently Asked Questions
How do I measure my dog correctly?
Use a soft tape on a standing dog: base of tail to base of neck for length, floor to top of head for height.
Should I choose a bigger size?
For beds, usually yes if your dog is between sizes. For crates, avoid going much larger. Use a divider if one is included.
Internal vs external dimensions?
Internal is the usable sleeping or standing space. External includes rims, frames and walls, so it is always bigger.
Same size for bed and crate?
No. A crate needs height and standing room. A bed needs sleeping area. Use the tabs above for each.
Does breed or weight change the result?
No. The size comes from your measurements. Weight only hides products with a lower listed weight limit.
Need More Help?
Read our guides before you buy.
How to measure a dog for a bed
Measure your dog standing, with a soft tape measure or a piece of string you can lay against a ruler. Take body length from the base of the tail to the base of the neck, where the collar sits (leave the tail out). Take standing height from the floor to the top of the head. Then watch how your dog sleeps for a few days. Curlers like a round or oval bed with a rim. Sprawlers need room for legs and head.
If your dog falls between two sizes, the larger bed is usually the safer choice.
How to measure a dog for a crate
Use the same length and height. A crate should let your dog stand without ducking, turn around and lie down, but not feel like a room. This calculator adds about 4 inches to body length and 3 inches to height. Those allowances are our own rule of thumb, so treat them as a starting point. For puppies, plan for the adult size and use a divider. Our crate training guide, dog crate buying guide and car safety gear guide cover the rest.
Internal vs external product dimensions
Listings often show the outside size. A bed with a thick rim can measure 36 inches across but have a much smaller flat sleeping area. Wire crates can also be a little smaller inside than their labels suggest. Where a listing gives an internal size we match against it. Where it gives only an external size, we mark the product "check internal size first" instead of saying it fits.
How sleeping style affects bed choice
- Curlers often like donut or bolster beds. See our donut bed review.
- Sprawlers usually do better on a flat bed with extra length.
- Mixed sleepers may prefer a bed sized for stretching out.
- Senior dogs or sore joints may need firmer support. Ask your vet, and see senior dog mobility and arthritis comfort.
How to use manufacturer sizing charts
Take the minimum from the calculator to the brand's own chart. Check whether it lists internal or external dimensions, what weight range each size suggests, and whether returns are easy. A size called "Large" differs between brands. For a wider comparison read our dog bed buying guide.
How this calculator works
- Curled bed: body length plus 10%, for both inside length and width.
- Stretched bed: (length + 6 in) plus 10%, and standing height plus 10% for width.
- Mixed bed: the larger of the two in each direction.
- Crate: length + 4 in, height + 3 in, width at least 60% of length.
- Results round up to the next whole inch. Conversions use 1 in = 2.54 cm and 1 lb = 0.4536 kg.
These are practical assumptions chosen by PetBoo, not a veterinary or industry standard. Your measurements stay in your browser. See our privacy policy.
Related guides
- Dog bed buying guide
- Dog crate buying guide
- How to crate train a puppy
- BedStill donut dog bed review
- Dog ramp vs stairs buying guide
- How much do puppies sleep?
Affiliate disclosure: as an Amazon Associate I earn from qualifying purchases, at no extra cost to you. Read our full affiliate disclosure. This page is educational and is not veterinary advice.