All lenses are interchangeable, impact resistant, and rated UV400 (blocking 99.9% of harmful UVA/UVB rays).
Muzzle Circumference: Less than 6 inches (15 cm).
Head Circumference: Less than 10.5 inches (26 cm).
Common Breeds: Dachshunds, Chihuahua, Small Terriers, Pomeranians
Common Weight: Between 4-15 pounds
Muzzle Circumference: Between 6-8 inches (15-20 cm).
Head Circumference: Between 10.5-12 inches (26-30 cm).
Common Breeds: Mini Schnauzers, Mini Australian Shepherds, Mini Pinchers, Mutts, Terriers, Italian Greyhounds, Whippet,
Common Weight: Between 10-25 pounds
Small Wide *designed for dogs with a wide, flat face*
Muzzle Circumference: Between 6 to 9 inches (15-22 cm).
Head Circumference: Between 12 to 15 inches (30-38 cm).
Common Breeds: Boston Terriers, Pug, French Bulldog, Shih Tzu
Common Weight: Between 15-40 pounds
Muzzle Circumference: Between 8-9 inches (20-22 cm).
Head Circumference: Between 12-14 inches (30-35 cm).
Common Breeds: Australian Shepherds, Mini, Australian shepherds, Setters, Brittany Spaniels, Spaniel mixes, Heelers, Greyhound, Whippet, Springer spaniels
Common Weight: Between 20-40 pounds.
Muzzle Circumference: Between 9-11.5 inches (22-29 cm).
Head Circumference: Between 14-17.5 inches (35-44 cm).
Common Breeds: Belgian Malinois, Dutch Shepherd, GSD, Border Collie, Australian Shepherd, Pointers, Labs, Mutts, Staffordshire terriers, Heelers, retrievers, Dobermans, Greyhound
Common Weight: Between 40-85 pounds.