Leather Basket Muzzle (Boston). BM2, Black. 13.5" circumference, 3" length. Best fits breeds like English Bulldog. Constructed of 100% genuine cowhide Available in Black and 9 popular sizes Light weight and provides ample ventilation Best fits breeds like English Bulldogs 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