Secure Leather Mesh Basket Dog Muzzle #12 Black - Doberman, Collie (Circumference 11.5", Snout Length 5") Made of high quality genuine leather and nickel-plated hardware, light and durable, comfortable. Great ventilation - the mesh of the muzzle gives the dog plenty of air, dog will not have hard time panting and breathing during the training. Well-fitting, safe and non-toxic, riveted for extra strength. This size is particularly suited for dogs like Doberman, Collie or other breeds with similar snout structure. Dog snout measurements: circumference 11.5", length - 5". Please, measure your dog's snout before you place the order to insure this is the correct muzzle size you need.