| Size | Weight | Back Length | Chest Size | Waist | Breed Examples | |
|---|---|---|---|---|---|---|
| X-Small | up to 10 lbs | 8" | 10"-14" | 9"-12" | A Cat, Chiuahua, Pomeranian | |
| Small | up to 25 lbs | 12" | 14"-20" | 12"-16" |
A Cat, Boston Terrier, Cocker Spaniel |
|
| Medium | up to 50 lbs | 15" | 20"-24" | 16"-22" | Beagle, Elkhound | |
| Large | up to 75 lbs | 18" | 24"-31" | 22"-28" | Labrador, Bull Terrier, Short Hair, Malinois | |
| X-Large | up to 150 lbs | 21" | 31"-40" | 28"-35" | Akita, Sheppard |