Quick answer: measure your dog’s body, then compare those measurements with the interior dimensions and sizing directions for the exact crate model. Do not choose a crate from breed or weight alone. The Humane Society says a crate should let a dog stand up and turn around; its guidance also says to plan for adult size when choosing for a growing dog.

Reviewed November 3, 2026. Method: this guide records a dog’s length and height, then uses the selected maker’s current size chart, product directions, and weight limit for the final check. It does not publish a universal size chart or guarantee fit.

Measure your dog

Use a flexible tape measure and have the dog stand naturally on a level surface. Ask another person to help if the dog will not stay still. Record the unit beside each measurement and repeat any measurement that looks uncertain.

1. Body length: measure from the tip of the nose to the base of the tail, leaving out the tail itself. Zoetis Petcare’s dog-crate guide describes this standing measurement.
2. Body height: measure from the floor to the top of the head while the dog is sitting, as described in that same guide. Note if the product maker tells you to measure a different posture or point.
3. Write it down: length ________ height ________ unit ________ date ________. These are your dog’s measurements, not crate dimensions.

Zoetis discusses adding a margin to the two measurements, but crate designs and measuring instructions can differ. Treat any general allowance as a starting point only: follow the intended maker’s directions and compare against the crate’s listed interior dimensions.

Check the exact crate listing

• Find the brand, model, and current size chart. Use that product’s own instructions rather than a chart for a different model or a generic breed/weight table.
• Confirm the listed dimensions are interior usable dimensions if both inside and outside measurements appear. Product listings may define dimensions differently, so ask the maker if it is unclear.
• Check the maker’s stated weight limit separately. Weight may be a product limit, but it cannot tell you whether the dog’s body fits comfortably.
• Compare the crate with your dog present if possible. The Humane Society’s basic check is that the dog can stand and turn around. Zoetis also describes sitting and lying down comfortably as fit checks.
• If the dog is a puppy, check whether the model has an adjustable divider and follow the maker’s directions. The Humane Society recommends choosing for expected adult size when a dog is still growing.

Record your comparison

Keep the chart link and date with your notes. Recheck them if you switch models, buy a used crate, or the dog grows. If the crate is for car travel or air travel, check the vehicle, airline, and applicable transport requirements separately; a home crate size check does not establish travel compliance.

Sources and limits

• Humane World for Animals: How to crate train your dog or puppy — states that the dog should be able to stand up and turn around, and recommends planning for adult size when choosing a crate for a growing dog.
• Zoetis Petcare: Tips for Choosing a Dog Crate — a veterinarian-authored guide describing body length and sitting-height measurements and advising readers to check the crate maker’s weight limit.

This is a measurement and shopping worksheet, not a fit certification, veterinary assessment, or transportation approval. Breed and weight alone do not establish a suitable crate dimension. Follow the exact maker’s current instructions and ask the maker or a veterinary professional if your dog’s fit or comfort is unclear. For another measured pet gear comparison, see the harness size checker; for first-year setup notes, use the adoption budget checklist.