Measure the distance from the base of the neck to the base of the tail.
Please use the following sizing guide to obtain and accurate fit.
(CM measurements are approximate only)
 NECK TO TAIL LENGTH CM SIZE DOG BREED
25 10 Pomeranian, Maltese, Silky Terrier
31 12 Cavalier, Pug, Jack Russel, Shih Tzu
36 14 Poodle, Scottish Terrier, Beagle, Cocker Spaniel, French Bulldog
41 16 Staffy, Cogi, Schnauzer, Fox Terrier
46 18 English Staffy, Bulldog, Boarder Collie, Boxer
51 20 Border Collie, Boxer Dalmatian
56 22 Dalmatian, Husky, Doberman, Labrador, Golden Retriever 
61 24 Golden Retriever, Labrador, Husky
66 26 Golden Retriever, Labrador, Husky
71 28 German Shepherd, Rottweiler, Irish Setter
76 30 Mastiff, Newfoundland, Great Dane, Neapolitan Mastiff 
81 32 Mastiff, Newfoundland, Great Dane, Neapolitan Mastiff, St Bernard

 

Always measure your dog before purchase for proper fit.