Wire Cage & Leather Muzzle (Miami). Size B1, Black. 11.5" circumference, 2.5" length. Bets fits dogs with short snouts like: Smaller Boxers Constructed of 100% genuine cowhide and metal Available in Black and over 25 sizes to fit practically every breed Felt-lined nose guard for comfort; Well ventilated and allows for dogs to drink Bets fits dogs with short snouts like: Boxers To fit correctly, measure: length from dog's eyes to the tip of the nose; circumference from 1 inch below the eyes and around the snout