| Chihuahua, Teacup Yorkshire Terrier |
XX-Small |
Up to 5 lbs (2.26 kg) |
8 - 10" (20.3-25.4 cm) |
5/16" (0.79 cm) |
| Dachshund (miniature), Maltese, Pomeranian, Toy Poodle, Yorkshire Terrier |
X-Small |
5-10 lbs (2.26-4.54 kg) |
9-15" (22.86-38.1 cm) |
3/8" (0.95 cm) |
| Cavalier King Charles, Pekingese, Miniature Schnauzer, Pug, Scottish Terrier |
Small |
10-25 lb (4.54-11.34 kg) |
13-23" (33.02-58.42 cm) |
5/8" (1.59 cm) |
| Beagle, Border Collie, Boston Terrier, English Bulldog, French Bulldog |
Medium |
Up to 55 lbs (25 kg) |
18-29" (45.72-73.66 cm) |
3/4" (1.905 cm) |
| Boxer, Dalmatian, Golden Retriever, Labrador Retriever, Weimaraner |
Large |
Up to 75 lbs (34 kg) |
22-39" (55.88-99 cm) |
1" (2.540 cm) |
| Bernese Mountain Dog, Great Dane, Mastiff, Rottweiler, Saint Bernard |
X-Large |
75+ lbs (34+ kg) |
28-48" (71 - 122 cm) |
1.25" (3.175 cm) |
