Metal Wire Basket Dog Muzzle Doberman Pinscher Female, Collie. Circumference 10.75", Length 4" Light, durable, comfortable, and safe. Very well ventilated. Allow for panting and drinking, dog will not have hard time breathing during the training. Ideal solution for grooming, off-leash walks This size is particularly suited for dogs like smaller Doberman Pinscher, Collie, or other breeds with similar snout structure. Circumference 10.75", length 4" (from the tip of the nose to the eyeline). Please, measure your dog's snout before you place the order to insure this is the correct muzzle size you need.