S - Mini Schnauzer / Bichon Frisé / Shih Tzu / Maltese / Dachshund / Beagle / Jack Russell / Cockapoo / Cocker Spaniel

M - Pug / English & French Bulldog / Pembroke / Welsh Corgi / Border Collie / Whippet

L - Staffordshire Bull Terrier / Basset Hound / Australian Shepherd / Poodle / Springer Spaniel / Huskey

XL - Labrador / German Shepherd / Golden Retriever / Greyhound

XXL - Rottweiler / Tibetan Mastiff / Bullmastiff / Great Dane