When we sized up the Petmate Vari Kennel range, we kept coming back to one rule every owner forgets: your dog should be able to stand without crouching, turn around fully, and lie flat with legs extended. Weight ranges printed on the box are a starting point, not the answer, because a lanky 60-pound dog and a stocky 60-pound dog often need different shells. We evaluated these kennels against IATA Live Animals Regulations, Petmateโ€™s own published interior dimensions, and aggregated owner feedback on fit and door security. Our goal was simple. We wanted to tell you which size to order the first time so you are not returning a crate that is two inches too short for your dogโ€™s ears. We focused on the medium, large, and extra-large shells, since that is where most sizing mistakes happen and where airline rejection at the counter is most common.