| Size | Chest | NECK TO TAIL | Breed Examples |
| X-SMALL | 10-12" | 6-8" | Teacup and Puppies under 5 lbs |
| SMALL | 14-16" | 10-11" | Chihuahua, Pomeranian, Australian Terrier, Yorkshire Terrier, Toy Poodle |
| MEDIUM | 18-20" | 14-15" | Pug, Maltese, Jack Russeli Terrier, French Bulldog, Boston Terrier |
| LARGE | 22-26" | 20-22" | Bichon Frise, Beagle, Cocker Spaniel, Corgi, Scottish Terrier |