Made with strong, comfortable and washable nylon materials, the Quick Fit Muzzle for Dogs by Four Paws helps stop biting, barking and chewing. Its unique design allows for panting and drinking for convenience. The adjustable quick fit strap requires only one initial fitting. Quick Fit Muzzles are used by professionals and are designed to be difficult for dogs to remove. The size 0 quick fit muzzle is suitable for snouts measuring 4.5 inches for Teacup/Toy Breeds (Cavaliers, Miniature Dachshunds, Miniature Poodles and Yorkies).