Size | Weight of Dog | Head Strap | Chin Strap | Frame Size* | Breed Example |
XS | 1-10 lbs. | 5-13" | 3-7" | 3.5" | Teacup & Toy sizes Chihuahua, Pomeranian, Yorkie |
Small | 9-25 lbs. | 12-20" | 4-8" | 4.75" | Beagle, Westie, Jack Russell, Cavalier King Charles |
Medium | 20-60 lbs. | 15-25" | 5-11" | 5.5" | Aussie, Border Collie, Dalmation |
Large | 50-100 lbs. | 18-30" | 7-16" | 6.38" | German Shepherd, Labrador, Retriever, Boxer |
XL | 100+ lbs. | 22-45" | 10-24" | 7.25" | Mastiff, St. Bernard, Newfoundland, Great Dane |