This Baskerville Ultra Muzzle is more adjustable than the original Baskerville muzzle. It provides all-around protection, but allows dogs to pant and drink.This lightweight muzzle features a basket design that gives all-around protection, but still allows unrestricted panting and drinking. Safety strapping ensures the muzzle will always remain securely in place and features two additional points of secure attachment. Made from extremely tough and durable, yet soft rubber.Material: RubberMeasure the circumference midway between the tip of the nose and eyes. Add 1" for small/medium breeds and 2" for large breeds.Rough Size Guide:Size: L= is from the front of the neck to the tip of the dogs nose, at an angle.S= Neck Strap: is the black strap that holds the muzzle on; measure around the neck just behind the head and up under the earsC=Circumference: is a measurement of each muzzle inside the basket at the wide "band" part that sits on the nose1) (L) 12,7 cm - (S) 25 cm - (C) 20 cm2) (L) 15,2 cm - (S) 30 cm - (C) 24 cm3) (L) 16,5 cm - (S) 35,5 cm - (C) 28 cm4) (L) 19 cm - (S) 40,6 cm - (C) 31,7 cm5) (L) 21,5 cm - (S) 45,7 cm - (C) 35,5 cm6) (L) 25 cm - (S) 51 cm - (C) 40,6 cm