Dogs My Love Metal Wire Basket Dog Muzzle Padded, Small Boxer. Circumference 13.5", Length 3.25" Light, durable, comfortable, and safe. Very well ventilated dog muzzle Felt lined genuine leather nose guard for maximum comfort of your dog Ideal solution for grooming, off-leash walks, for panting and drinking, dog will not have hard time breathing during the training. and vet visits Allows for panting and drinking, dog will not have hard time breathing during the training. For correct sizing please measure snout circumference below the eye-line and snout length; and snout length from eye-line to the tip of the nose. Circumference 13.5", Length 3.25". This size is particularly suited for smaller Boxer and other breeds with similar head structure.