PAWZ is the world"s only disposable and reusable, waterproof dog boot. Protects from snow melt, lawn chemicals, liquids, soil or sand. Made of natural rubber, PAWZ are 100% biodegradable. PAWZ are designed to go on easily and fit securely without zippers or straps. Fashionable yet durable, PAWZ offers serious paw protection. PAWZ is the most natural-feeling boot your dog can wear because without padding your dog can feel the ground, providing a needed sense of security. Like a sock, PAWZ moves with your dog allowing full paw motion and maximum comfort. Imagine never losing another expensive boot again. PAWZ come 1 in a package and each boot may be worn many times. How To Measure: Measure your dog"s paws for the proper size. Put the paw on a piece of paper on the floor and trace around it. Measure the widest part of the tracing from one side to the other. Tiny - Teacup Poodle, Teacup Yorkie & Others with paws less than 7/8" wide. XX Small - Chihuahua, Dachshund, Toy Poodle, Yorkshire Terrier, Papillon. For paws 1/2" to 1" wide. X Small - Chihuahua, Italian Greyhound, Pug, Shih Tzu, Mini Pinscher. For paws 1" to 1 1/2" wide. Small - Border Terrier, Boston Terrier, Brussels Griffon, Fox Terrier, Shiba. For paws 1 1/2" to 2" wide. Medium - American Eskimo, beagle, Cocker Spaniel, Dachshund, Lhasa Apso, Tibetan Terrier, Vizsla. For paws 2" to 3" wide. Large - Bulldog, Doberman Pinscher, German Shepherd, Husky, Labrador Retriever, Rottweiler. For paws 3" to 4" wide. Extra Large - Great Dane, Great Pyrenees, Bull Mastiff, Newfoundland, Old English Sheepdog, Giant Schnauzer. For paws 4" wide and up.