Puppy crate size guide (UK): what size to buy, by breed
Crate sizes in the UK are sold in inches and named by dog size, which helps nobody. Here is how to work out the size your puppy actually needs — and why buying for the adult dog is usually right.
The short answer
- Our pick
- Buy the crate your dog will need as an adult and use the divider panel to shrink it while they grow.
- Best on a budget
- Any 30in or 36in wire crate with a divider and a slide-out tray does the job; the brand matters far less than the divider.
- Who should not buy this
- Anyone whose puppy already sleeps settled and toilet-trained in a room, and who has no plans to travel by car with them. A crate is a tool, not an obligation.
Most crate-size advice online is American. The sizes quoted are American, the breeds used as examples are American, and the measurements are given in a way that does not match how British retailers list their stock. This guide fixes that.
The rule that actually matters
A crate is the right size when the dog can stand up without ducking, turn around without contorting, and lie down fully stretched on their side. That is the whole standard. Anything bigger is not kinder — it is what allows a puppy to toilet at one end and sleep at the other, which is the single most common reason crate training stalls.
Measure the dog, not the breed:
- Length. Nose to base of tail, then add 5–10 cm.
- Height. Floor to the top of the head while sitting, then add 5–10 cm.
Round up to the next crate size. British crates are sold in inches — 24”, 30”, 36”, 42” and 48” are the common steps — and that figure is the crate’s length.
Buy for the adult dog, and use a divider
This is the part that saves money. A puppy outgrows a puppy-sized crate in roughly three months. Instead, buy the size the adult dog will need and use the divider panel that most crates include to shrink the usable space, moving it back as the dog grows.
If the crate you are looking at does not come with a divider, that is a reason to look at a different crate rather than a reason to buy two crates.
Rough sizes by breed
Treat this as a starting point, then measure. Within any breed there is more variation than people expect, and crossbreeds sit wherever they like.
| Adult size | Crate length | Typical breeds |
|---|---|---|
| Small | 24” | Jack Russell, Dachshund, Miniature Poodle, Pug |
| Medium | 30” | Cocker Spaniel, Cockapoo, Beagle, Border Terrier |
| Large | 36” | Border Collie, Springer Spaniel, Whippet, Staffie |
| Extra large | 42” | Labrador, Golden Retriever, Boxer, German Shepherd |
| Giant | 48” | Great Dane, Newfoundland, Bernese Mountain Dog |
A cockapoo is the one people get wrong most often, because the size depends entirely on whether the poodle parent was miniature or standard. A 30” crate suits most; a large cockapoo will want 36”.
Where the “too big is fine” advice goes wrong
You will read that a bigger crate is more comfortable. For an adult dog who is already house-trained, that is broadly true. For a puppy in the first weeks, it is the opposite: space is precisely what removes the instinct not to soil the sleeping area. The divider exists for this reason.
The other failure mode is the opposite one — a crate so tight the dog cannot straighten out on their side. A dog who cannot lie flat will not settle, and a dog who will not settle will tell you about it at four in the morning.
Height is the measurement people forget
Length gets all the attention because it is the number on the box. But a tall, leggy puppy — a lurcher, a young collie, a standard poodle cross — will hit the roof of a crate that is nominally the right length. If the dog has to lower their head to stand, the crate is too short whatever the label says.
Before you buy, check three things
The door. Single door, double door, or a sliding door that does not swing into the room. In a narrow British hallway or a small kitchen, a sliding door is often the difference between a crate that fits and one that does not.
The tray. A plastic tray that slides out is worth having and will be cleaned more often than you expect. Metal trays are louder and buckle over time.
The folded size. Most wire crates fold flat. If the crate will travel, or be put away, the folded dimensions matter as much as the open ones.
Who should not buy a crate at all
If your puppy is already settled sleeping loose in a room, is toilet-trained, and you have no plans to travel by car with them, you may simply not need one. A crate is a tool for house-training, safe containment and car travel. It is not compulsory, and buying one out of obligation, then leaving it unused in a corner, is the most common way to waste sixty pounds on this list.
And if the plan is to leave the puppy crated for long stretches during a working day, the crate is not the problem to solve. That is a question about cover and company, not about kit.