How to Choose the Right Kennel Size for Your Dog? | Measure Twice, Buy Once

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Pick the smallest kennel that lets your dog stand, turn around, and lie flat with about 2–4 inches of clearance — extra room beyond that invites indoor accidents.

For the full breakdown, see our best 10×20 Dog Kennel guide.

A kennel that’s one size too big gets treated as a bedroom with a bathroom attached. Dogs will happily sleep in one corner and soil the other, which undoes weeks of house-training. The right size is snug but never cramped: room to stand without ducking, spin in a full circle, and stretch out flat. Getting there takes a tape measure and about five minutes, not a guess based on your dog’s breed label.

How Do You Measure a Dog for a Kennel?

Measure your dog standing naturally on all fours, not sitting or curled up. Two numbers do most of the work: nose to the base of the tail for length, and floor to the top of the head for height.

Ignore the tail itself. Travel guidance is specific on this point — measure to the base of the tail, not the tip, or you’ll overshoot the crate by several inches and lose the snug fit that makes house-training work. If your dog has upright ears, measure to the top of the ears for transport crates, since some carriers require the dog to stand without touching the ceiling.

  • Length: nose to base of tail, standing square.
  • Height: floor to top of head (or ear tips for travel).
  • Width: across the shoulders for a fit check.

Write those numbers down before you look at a single crate listing.

What Size Kennel Does Your Dog Actually Need?

Add 2–4 inches to your dog’s measured length and height, and that’s your minimum interior size. Weight-based charts get you in the ballpark, but your tape measure is the tiebreaker — two 40-pound dogs can differ by four inches in body length.

Dog Weight Body Length Kennel Size
Under 25 lbs Up to 20 in 18–22 in
Under 30 lbs Up to 22 in 24 in
Under 40 lbs Up to 28 in 30 in
Under 70 lbs Up to 34 in 36 in
Under 90 lbs Up to 40 in 42 in
90–150 lbs 46–68 in 48–72 in

One check the chart can’t do for you: stand your dog next to the assembled crate if you can. A dog that has to lower its head to enter, or can’t turn without scraping both sides, needs the next size up — regardless of what the weight band says.

Home Kennel or Travel Crate — Do the Rules Change?

Yes, and this is where most buyers get burned. Everyday home crates follow the “snug but comfortable” rule. Airline-style transport crates follow stricter math, and they are not interchangeable.

The pet must be able to stand naturally without touching the ceiling and turn around completely. A crate that’s perfect in the living room can fail those transport minimums, so verify the carrier’s requirement before you book anything.

Two more traps worth knowing. Retailer listings often quote exterior dimensions while you need interior space — a 36-inch crate may only offer 33 inches inside. And some published minimums are region-specific: UK boarding-license guidance sets enclosure areas by weight in square meters, while the AKC figures are aimed at U.S. readers. Match the standard to your actual use case.

Check Your Fit in Ten Seconds

Once the kennel is assembled, run this quick pass. Your dog should stand tall without its head brushing the top, turn in a full circle without ducking, and lie down stretched out. If any of those fails, size up. If your dog can curl up in one corner and still have a wide open corner left over, size down. When you’re ready to compare full setups side by side, our tested 10×20 dog kennel roundup breaks down real dimensions and build quality so you can match a unit to your yard and your dog.

FAQs

Should I buy a kennel based on my dog’s breed?

No. Breed labels are a starting point at best, because individuals within a breed vary widely in body length and height. Measure your own dog standing, then add 2–4 inches to the length and height. That beats any breed chart, and it takes less time than reading one.

Is a bigger kennel always kinder to my dog?

Not for house-training. A kennel with too much spare room lets a dog toilet in one corner and sleep in another, which slows housetraining and creates a cleaning routine you don’t want. Snug enough to stand, turn, and lie flat is the target — comfort and training both improve at that size.

What if my dog is between two kennel sizes?

Size up if the smaller crate leaves no room to stand without ducking, or no room for a full turn. Size down if your dog fits with several inches of unused space on every side. Between the two, err toward the smaller crate — it still must allow standing, turning, and lying flat.

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