The dog booties feature high-quality breathable mesh, water resistant faux leather edging and anti-slip flexible rubber sole. Adjustable velcro strap at the ankle and zipper closure keep your dog's paws snug and secure. It's a perfect choice for small dogs or puppies on daily walks during spring, summer and early fall. SIZE GUIDE The mesh boots work for small dogs weighing (roughly!) 3-15 lbs, with paw length. To ensure the snug fit, we offer rain boots in 3 sizes. Before buying, measure your pooch's front paw. Place the paw on a piece of paper, mark the length and width of the paw. Compare the results with the boot measurements below. If the measurements are between sizes buy the size larger especially if your dog is extra furry. Very Small Size fits up to 1.4" long x 1.2" wide paws (approx. weight 3-7 lbs) Breed examples: teacup breeds, Chihuahua, English Toy Terrier, Maltese, Miniature Pinscher, Papillon, Pomeranian, Toy Fox Terrier, Toy Poodle, Toy Yorkie. Small Size fits up to 1.6" long x 1.2" wide paws (approx. weight 6-12 lbs). Breed examples: Brussels Griffon, Chihuahua, English Toy Terrier, German Spitz (miniature), Japanese Chin, Lowchen, Maltese, Miniature Pinscher, Papillon, Pomeranian, Toy Fox Terrier, Toy Poodle, Yorkie. Small Plus Size fits up to 1.8" long X 1.4" wide paws (approx. weight 9-15 lbs) Breed examples: Affenpinscher, Bichon Frise, Boston Terrier, Brussels Griffon, Chinese Crested, German Spitz (miniature), Havanese, Italian Greyhound, Japanese Chin, Jack Russell (small), Maltese, Miniature Eskimo Dog, Miniature Dachshund, Miniature Pinscher, Norfolk & NorwichTerrier, Papillon (large), Pomeranian (large), Pekingese, Pug, Rat Terrier, Shih Tzu, Silky Terrier, Toy Poodle, Yorkie. The shoes will also fit puppies of medium sized dogs.