Size 2: 1.8''x2.4''(W*L) for 18-27 lbs; size 3: 2.0''x2.5''(W*L) for 23-33 lb; size 4: 2.2''x2.6''(W*L) for 31-40 lbs; size 5: 2.4''x2.8''(W*L) for 40-55 lbs; size 6: 2.6''x3.0''(W*L) for 52-65 lbs; size 7: 2.8''x3.2"(W*L) for 63-75 lbs; size 8: 3.0''x3.3"(W*L) for 74-88 lbs. If dog's paws are in between 2 sizes and if you've chosen the larger one, you could try to use socks for dog inside the boots. BREATHABLE MESH: Made with tightly woven air mesh that keeps dirt and debris out while staying comfortable and ventilated all day long, perfect for summer. SECURE and ADJUSTABLE: Easy to put on / off. These dog shoes expands with a wide split seam opening and adjustable and reflective velcro straps to ensure a tight fit, also make your dog safe at night. RUGGED: Tough anti-slip sole of dog boots provides stability and traction, protection from sharp thorns and hot pavement. FASHIONABLE DESIGN: Use high quality fabrics, very light and softly touch, no hurt for your pets’ paws. Keep a smoothly adventure or walking. Fashionable design makes a eye-catching for your lovely dogs.