Size 5(3.7"x 2.8") (L*W) for 40-60 lbs. Great for Border Collie; American Cooker Spaniel; Medium Chow etc.Please mainly refer to the width, length can be used as an additional reference. Please choose the right size for your puppy referring to the picture size chart. High-quality fabric:Wear-resistant for dog boots, high-grade space leather + nylon reflective strip + reflective square webbing + rubber outsole, dog boots are dirt-resistant, soft and hand-washable, stylish and durable. Dog boots have durable soles and tough non-slip soles provide stability and traction, helping dogs have mobility and stability on tiles and sand. Comfortable:The soft and breathable claws allow the boots to be used indoors or outdoors, dry, wet, cold and hot. Prevent sharp thorns and hot road from hurting the claws. Effectively protect dog paws from heat, stones, glass, etc. It protects fragile paws from snow, ice, and salt in winter. Reflective and adjustable lace-up dog shoes:Easy to put on and take off, the dog shoes are firmly fixed by 2 straps, the straps are long and adjustable to prevent sliding and provide customized tightness to ensure safe closing, and are equipped with Reflective box belts improve visibility at night and ensure the safety of pets. After putting on dog boots, please try to tighten the straps as much as possible. This can effectively prevent dog boots from falling off the dog's paws. Help Your Pet Become A Charming Superstar:We hope that our dog beach shoes can provide support for every pet who needs it, so that they can enjoy life without pain. Pets make us happy and joy and we hope that pet world can be simple, innocent, cute, and loyal!