A crate that’s too small is cramped and miserable. One that’s too big can make house training harder. So what size dog crate should you buy? The rule of thumb is simple: your dog should be able to stand up without ducking, turn around easily and lie down stretched out, with only a little room to spare.
Getting there takes a tape measure and a few minutes. Let’s walk through how to measure, how to handle a growing puppy and what to check for big breeds.
How to measure your dog for a crate
You only need two measurements. First, measure length, from the tip of your dog’s nose to the base of the tail (not the tip of it). Second, measure height, from the floor to the top of the head while your dog is standing, or to the tips of the ears if they stand up tall.
Now add some wiggle room. A common guide is to add about two to four inches to both numbers. Small dogs sit at the low end of that range, and large dogs at the higher end. Compare your totals with the crate’s interior dimensions, not the outside size, since walls, trays and frames take up space.
Crate size by dog size: a rough guide
Dog breeds vary a lot, so use this only as a starting point and trust your tape measure.
| Dog size | Typical weight | Typical crate length |
|---|---|---|
| Extra small | Under 10 lb | 18 to 22 inches |
| Small | 10 to 25 lb | 24 inches |
| Medium | 25 to 40 lb | 30 inches |
| Large | 40 to 70 lb | 36 to 42 inches |
| Extra large | 70 to 90 lb | 42 to 48 inches |
| Giant | Over 90 lb | 48 inches or more |
A lean sighthound and a stocky bulldog might weigh the same and still need different crates, which is why the measurements matter more than weight alone.
What size crate does a puppy need?
Here’s the tricky part. Puppies grow fast, and you don’t want to buy three crates. The good news is that you don’t have to. Buy a crate sized for your puppy’s expected adult size, then use a divider panel to shrink the space for now.
Why not just give them the full space? Puppies usually avoid soiling where they sleep, but a roomy crate lets them use one corner as a bathroom and sleep in another. A smaller space keeps house training on track. Move the divider back as your puppy grows. If you’re about to start training, our step-by-step guide on how to crate train a puppy shows how to put the crate to use.
Choosing a crate for a large or strong dog
Big dogs bring a few extra things to think about. A thin wire crate can bend under a determined pusher, and a dog that panics may injure themselves trying to escape. Look for thicker wire or metal frames, secure latches (double latches are better), and a solid floor tray.
Also, check door size. Your dog needs to get in and out without squeezing. If you’re shopping for a larger breed, take a look at our guide to the best heavy duty dog crates for large dogs to see what a sturdy build looks like.
One more safety point: if your dog shows serious distress, drooling, or tries to break out, talk to a vet or trainer instead of buying a stronger crate. That kind of panic is a sign something else needs to be addressed.
Making the space comfortable
Once the size is right, the inside matters. A flat, cushioned surface helps your dog sleep well, but anything the dog can chew apart should be skipped if your dog is a chewer. A washable bed that fits the floor of the crate is a practical pick, and our roundup of the best washable dog beds with removable cover can help you find one that fits snugly without crowding.
Frequently asked questions
Can a dog crate be too big?
Yes. If your dog can sleep at one end and use the other as a bathroom, the crate is too big for house training. A divider fixes that for growing puppies.
Should my dog be able to stand up in the crate?
Yes. Your dog should stand without bending their head or back, turn around fully and stretch out while lying down.
How do I know when to size up?
Measure again every few weeks during the first year. If your dog looks cramped, can’t turn easily or hunches to stand, it’s time for a bigger size or a moved divider.
The bottom line
To pick the right dog crate size, measure nose to tail base and floor to head, add a few inches, and choose a crate with those interior dimensions. Use a divider for puppies, and go heavier-built for strong dogs. That small bit of math makes crate time far more comfortable for everyone.