| Size | Length | Chest | Neck | Breed Examples |
| Xsmall | 8" | 12 - 16" | 10 - 12" | Bichon Frise, Brussels Griffon, Maltese, Miniature Pincher, Papillon |
| Small | 12" | 16 - 20" | 12 - 14" | Dachshund-Miniature, Norfolk Terrier, Pekingese, Pomeranian, Toy Poodle |
| Medium | 16" | 20 - 24" | 14 - 16" | Beagle, Dachshund, Jack Russell Terrier, Lhasa-Apso, Miniature Scottie, Schnauzer |
| Large | 20" | 24 - 28" | 16 - 20" | Small Boxer, Labrador Retriever, Golden Retriever, Weimaraner, Whippet |
