Correct fit prevents neck strain, chafing, and gear escapes. Use the weight brackets and measuring steps below to find the ideal size for your companion.
| Fit Tier |
Weight Range |
Chest Girth |
Neck Girth |
Representative Breeds |
| XS · Toy |
Under 10 lbs (<4.5 kg) |
12" – 16" (30–40 cm) |
8" – 11" (20–28 cm) |
Chihuahua, Pomeranian, Yorkshire Terrier, Toy Poodle |
| S · Small |
10 – 25 lbs (4.5–11 kg) |
16" – 22" (40–55 cm) |
11" – 15" (28–38 cm) |
French Bulldog, Pug, Boston Terrier, Dachshund, Cavalier |
| M · Medium |
25 – 55 lbs (11–25 kg) |
22" – 28" (55–70 cm) |
15" – 19" (38–48 cm) |
Corgi, Beagle, Australian Shepherd, Border Collie, Spaniel |
| L · Large |
55 – 80 lbs (25–36 kg) |
28" – 34" (70–86 cm) |
19" – 23" (48–58 cm) |
Golden Retriever, Labrador, Boxer, German Shepherd, Husky |
| XL · Giant |
80+ lbs (36+ kg) |
34" – 44" (86–112 cm) |
23" – 28" (58–71 cm) |
Great Dane, Bernese Mountain Dog, Rottweiler, Mastiff |
1
Chest Girth (Critical)
Measure behind front legs around the deepest part of the ribcage. Keep tape snug with 2 fingers of breathing ease.
2
Neck Circumference
Measure at the base of the neck where the collar rests. Ensure tape won't slip over the head during a sudden pull.
3
The 2-Finger Rule
If between sizes or your dog has a barrel chest (e.g. Frenchies, Boxers), always size up to prevent underarm chafing.
30-Day Chafing & Fit Guarantee: If your gear does not fit comfortably on your dog's first walk, we provide free instant size exchanges.
