Leather Basket Muzzle (Boston). BM3, Black. 12.25" circumference, 3.25" length.  Best fits breeds like Boxers. Constructed of 100% genuine cowhide Available in Black and 9 popular sizes Light weight and provides ample ventilation Best fits breeds 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