Real Leather Cage Basket Secure Dog Muzzle #131 Black - Great Dane, Saint Bernard, Mastiff(Circumference 15", Snout Length 4") Well-ventilated, light and durable. Adjustable leather straps wouldn't stratch Well-fitting, comfortable muzzle is made of high quality genuine leather, trimmed and riveted for extra strength. Dog snout measurements: circumference 15"(38cm), length - 4"(10cm). The middle adjustable muzzle strap forms a loop around your dog's regular collar to ensure the muzzle will always remain securely in place. This size generally most suitable for XLarge breeds like Great Dane, Saint Bernard, Mastiff, or other breeds with similar snout structure.