Leather Basket Muzzle (Boston). BM1, Black. 9" circumference, 2" length. Best fits breeds like French Bulldog, Pug, Boston Terrier. Constructed of 100% genuine cowhide Available in Black and 9 popular sizes Light weight and provides ample ventilation Best fits breeds like French Bulldogs, Pugs, Boston Terriers 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 Every dog is unique and has a different snout (nose). It is extremely important that you measure from just below the eye and to the tip of the nose (length) and just below the eye and around the widest part of the snout (circumference). Once you have these 2 measurements, please proceed to check the different muzzles available and whether or not it will comfortably fit your dog. Make sure to leave at least  in length so that the dogs snout does not touch the end of the muzzle