Real Leather Dog Basket Muzzle #107 Black - Pit Bull, AmStaff (Circumference 12", Snout Length 3.5") Well-ventilated, light and durable. This size generally most suitable for Pit Bull, AmStaff Well-fitting, comfortable muzzle is made of high quality genuine leather, trimmed and riveted for extra strength. Dog snout measurements: circumference 12", length - 3.5". Adjustable leather straps wouldn't stratch.