IATA crate sizes for dogs
The rule airlines audit against is simple and it is not a breed chart: your dog must be able to stand fully upright without its ears touching the roof, turn around completely, and lie down in a natural position. Four measurements produce the size, nose to tail base, floor to elbow, width at the widest point, floor to top of head or ear tips while standing, and the crate length is the first plus half the second. Breed names get you close and get you refused at the counter often enough that we do the measurement on a video call rather than trusting the label on the box.
