Measure your pet's neck where their collar normally sits. If you dog's neck measures at the maximum of a size, it's best to order the next size up. Find your dog's neck measurement for the correct size below:

Small 10-14", 1" wide (Beagle, Cocker Spaniel, Boston Terrier)
Medium 12-17”, 1" wide (Standard Poodle, Springer Spaniel, French Bulldog)
Large 15-22”, 1" wide (German Shepherd, Labrador, Golden Retriever)