Wire Cage & Leather Muzzle (Miami). Size 4, Black. 10" circumference, 3.5" length. Best fits mid-size dogs like: Poodles, Fox Terriers, Spaniels 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 Best fits mid-size dogs like: Poodles, Fox Terriers, Spaniels 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