| Size | Animal weight | Breed |
| Tiny | <7 lbs | Yorkshire Terrier, Teacup Poodle, Pomeranian |
| Toy | 7-15 lbs. | Cairn Terrier, Daschund, Miniature Pinscher |
| Small | 15-30 lbs. | West Highland Terrier, Shiba Inu, Beagle, Pug |
| Medium | 24-45 lbs. | Corgi, Border Collie, Cocker Spaniel |
| Large | 45-85 lbs. | Siberian Husky, Standard Poodle, Pitbull, Labrador Retriever |
| XLarge | 85-120 lbs. | Akita, Bernese Mountain Dog, Wolfhound |
| Giant | 120-160 lbs. | Great Dane, Mastiff, Newfoundland, St Bernard |
| XGiant | over 160 lbs. | Mini Horse |
