How to Pick the Right Dog Crate Size in 2026: Measuring Your Dog and Avoiding Common Mistakes

That is it. Not a luxury suite, not a closet. A crate that is too small causes physical discomfort and anxiety. A crate that is too large — and this is the part most owners miss — actively undermines house training, because a dog with excess room will simply use one corner as a bathroom and sleep comfortably in the other. The crate is meant to leverage your dog's natural instinct to keep their den clean. That instinct only kicks in when the space is appropriately snug. Get the size wrong in either direction and you are fighting your dog's biology instead of working with it. This guide will walk you through exactly how to measure your dog, how to read a size chart, how to handle puppies who are still growing, and how the crate material itself affects which size you should buy.

Add 2 to 4 inches to that number. That is your minimum crate length. Second, measure your dog's height. Again with the dog standing, measure from the floor to the top of their head, or to the top of their ears if the ears stand erect. Add 2 to 4 inches. That is your minimum crate height. Those two numbers are your non-negotiables. Width is secondary — most crates are proportioned appropriately once you match length and height, but always double-check the manufacturer's internal dimensions, not the external frame size. The difference between internal and external measurements can be 2 to 3 inches on each side, which matters enormously for a medium-sized dog. One practical tip: if your dog is between sizes, go up, not down. A slightly larger crate is manageable. A crate that forces your dog to crouch will make them dread it, and you will spend weeks undoing that negative association.

Think Chihuahuas, Toy Poodles, Shih Tzus, and similarly compact breeds. Internal height is typically around 19 to 21 inches. Medium crates (30 inches long): Suitable for dogs roughly 26 to 40 pounds. Cocker Spaniels, Beagles, French Bulldogs, and Miniature Schnauzers typically fall here. Internal height runs around 21 to 24 inches. Large crates (36 inches long): Suitable for dogs roughly 41 to 70 pounds. Labrador Retrievers, Border Collies, Australian Shepherds, and Boxers are common fits. Internal height is usually 24 to 27 inches. Extra-Large crates (42 inches long): Suitable for dogs roughly 71 to 90 pounds. German Shepherds, Golden Retrievers, Standard Poodles, and Siberian Huskies often need this size. Internal height is typically 28 to 30 inches. XXL crates (48 inches long): Reserved for giant breeds — Great Danes, Saint Bernards, Mastiffs, and Irish Wolfhounds. Internal heights can reach 33 inches or more. A word of caution on breed weight guides you will find on manufacturer packaging: they are a starting point, not a guarantee. A stocky, heavily muscled 60-pound Bulldog may need a larger crate than a lean, leggy 60-pound Whippet. Always default to your tape measure over the breed label.

The space is too large, the puppy eliminates freely, and house training stalls. You have two practical options. The first is to buy a crate with a divider panel. Many wire crates come with an adjustable divider that lets you block off the back portion, making the usable space smaller. As your puppy grows, you slide the divider back. You buy the crate once, adjust it over time, and end up with the right adult-size crate at the end. This is the most cost-effective approach for large and giant breeds. The second option is to buy a correctly sized small crate for the puppy now and upgrade when they outgrow it. This makes more sense for small breeds that will not grow dramatically — a Bichon Frise puppy will not need a dramatically different crate at 12 months than at 4 months. For large breeds, the divider approach almost always saves money and hassle. If you are unsure how large your mixed-breed puppy will get, ask your vet for a growth estimate at the next checkup. Paw size is a rough indicator but not reliable enough to base a purchase on.

The open design means your dog can see the room around them, which some dogs find reassuring and others find overstimulating. Wire crates also tend to have the most accurate and consistent internal dimensions across brands, making it easier to size-shop. The main trade-off is weight and portability — a 42-inch wire crate is not something you want to move daily. Plastic crates — the airline-style hard-shell variety — run smaller on the interior for the same stated size because the thick walls eat into usable space. If you are buying a plastic crate, measure the internal dimensions carefully and do not assume a size labeled 'large' matches a wire crate labeled 'large.' Plastic crates also retain more heat, which matters for brachycephalic breeds like Bulldogs and Pugs who are already prone to overheating. On the upside, the enclosed feel suits dogs who prefer a darker, more den-like environment and can reduce anxiety in dogs who find open wire crates stressful. Soft-sided crates are appropriate only for dogs who are already fully crate-trained, calm, and not prone to chewing or scratching. They are not suitable for puppies or dogs with separation anxiety. Sizing in soft-sided crates is the least standardized — always measure the internal floor space and height before buying. For travel and already-trained small dogs, they are genuinely convenient. For anything else, they are the wrong tool. If your dog shows signs of anxiety around the crate regardless of size or type, addressing the anxiety directly is worth considering before investing in more crate hardware. The Thundershirt Classic Dog Anxiety Jacket is one option some owners use during the crate introduction phase to reduce general stress responses, though it is not a substitute for proper desensitization training.

Once that association is formed, it is very difficult to undo. The crate needs to be introduced as a neutral-to-positive space from day one. Feed meals near the crate, then inside it. Toss treats in casually throughout the day without closing the door. Let the dog choose to go in. Only once the dog is entering voluntarily and relaxing inside should you begin closing the door, and then only for short intervals at first. A correctly sized crate makes this process significantly easier because a comfortable dog is a calm dog. But even a perfectly sized crate will fail if the dog associates it with stress or punishment. The size gets you the right environment. The training gets you the right behavior. Both matter equally. When you are ready to shop for a crate that fits your dog's measurements, browse the full selection on our pet supplies page. You will find options across all sizes and styles without the pressure of a hard sell — just the information you need to make the right call.