Size it for the adult dog, then divide
Look up the typical adult height and length for your dog’s breed (or for a crossbreed, the larger parent) and buy for that. Then set the divider so the puppy has just enough room to stand, turn and lie down.
| Adult dog size | Typical crate length |
|---|
| Toy breeds | 24 in |
| Small breeds | 30 in |
| Medium breeds | 36 in |
| Large breeds | 42 in |
| Giant breeds | 48 in and up |
These are the standard sizes crates are sold in rather than a rule; the real check is the AKC’s, which is your actual dog standing up, turning around and lying down. Measure the dog rather than trusting the breed chart, and if you are between sizes go up — that is what the divider is for.
The thing nobody tells you: you also need a pen
A crate is for sleeping and for short periods of settled rest. It is not where a puppy spends its waking day, and the AKC is explicit that a crate should never be used as punishment or as long-term confinement. But a puppy you cannot watch also cannot be loose in a kitchen.
The answer most experienced owners land on is a crate plus an exercise pen: the crate for sleeping, the pen for the awake hours when you are cooking, working or on the phone. Trying to make one crate do both jobs is the most common route to a puppy that hates its crate — and a puppy that hates its crate is a problem that takes months to undo.
Wire, plastic or soft-sided?
- Folding wire — the default, and correctly so. Cheap, airy, foldable, and the only type that comes with a divider. Cover it with a blanket if your puppy settles better in a den.
- Rigid plastic kennel — the den-like option, and the type used for air travel. Heavier and less ventilated; buy it if you fly, not as a first crate.
- Soft-sided — a second crate, not a first one. It sets up in seconds at a friend’s house, and a puppy that has not learned to settle will chew straight out of the mesh. Buy it once crate training has actually taken.
Crate training, briefly and correctly
The AKC’s method is worth following rather than improvising:
- Introduce it as a good place. Door open, food and toys inside, no pressure. The puppy should go in of its own accord before it is ever shut in.
- Feed meals in it. A crate that produces dinner is a crate the puppy walks into.
- Build duration slowly — door shut for seconds, then minutes, with you in the room, before you leave it.
- Never use it as punishment. This is the AKC’s explicit warning and it undoes everything above.
- Toilet first, crate second. A puppy shut in with a full bladder learns that the crate is where accidents happen, which is the exact habit the divider exists to prevent.
What goes inside
A flat mat rather than a bolstered bed — bolsters eat the space the sizing rule just gave you. Expect it to be chewed; a crate mat is a consumable in the first year, which is an argument for the cheap one now and the good one later. Water is a judgment call: a clip-on bowl for longer periods, nothing for a short nap. And no collar with dangling tags, which can catch on crate bars.
