Head Circ.: <26cm Muzzle Circ.: <15cm Common Breeds: Dachshunds, Chihuahua, Small Terriers, Pomeranian, dogs under 10 lbs. • Common Weight: Between 4-15 pounds
Head Circ.:26cm-30cm Muzzle Circ.:15cm-20cm • Common Breeds: Mini Australian Shepherds, Mini Pinchers, Mutts, Terriers, Italian Greyhounds, Whippet, Mini Schnauzers • Common Weight: Between10-25 pounds
Head Circ.: 30cm-35cm Muzzle Circ.: 20cm-22cm • Common Breeds: Australian Shepherds, Mini Australian shepherds, Setters, Brittany Spaniels, Spaniel mixes, Heelers, Greyhound, Whippet, Springer spaniels • Common Weight: Between 20-40 pounds
Head Circ.:35cm-44cm Muzzle Circ.: 22cm-29cm • Common Breeds: Belgian Malinois, Dutch Shepherd, GSD, Border Collie, Australian Shepherd, Pointers, Labs, , Staffordshire terriers, Heelers, retrievers, Dobermans, Greyhound • Common Weight: 40-85 pounds.
HEAD CIRCUMFERENCE: >44CM MUZZLE CIRCUMFERENCE: >29CM • Common Breeds: Great Dane, Dogo Argentino, Bernese Mountain Dog, GSD (large), Labs (large), Cane Corso, Great Pyrenees, Rottweiler, Malamute, Bull Terriers, Dobermans • Common Weight: over 80 lbs.