Real Leather Dog Basket Muzzle #104 Brown - Amstaff (Circumference 11.8", Snout Length 3") Well-ventilated, light and durable. This size generally most suitable for Amstaff or other breeds with similar snout structure. Well-fitting, comfortable muzzle is made of high quality genuine leather, trimmed and riveted for extra strength. Dog snout measurements: circumference 11.8", length - 3".