MEASURE- XS: 2.16x1.9x5.9in (LxWxH) S: 2.36x2.09x6.3in (LxWxH) M: 2.75x2.44x7.48in (LxWxH) L :3.15x2.75x8.66in (LxWxH) XL: 3.54x3.15x9.64in (LxWxH) According to the second picture, measure your dogs right size and choose the suitable one. Dog socks should fit snugly, please choose a close size. If you are in between sizes choose the larger size. NON-SLIP WATERPROOF- It has a good anti-slip effect and can provide traction to protect the dog's claws from the road, grass and tiles. deck, boat, winter salt, snow, ice, indoor hardwood floors and other surface injuries, also provide traction or racing for dog walking. WINTER MUST This dog shoes are made of high-quality waterproof fabric, soft and breathable, wear-resistant, and keep the claws clean and dry. This dog boots are suitable for all weather conditions such as winter, snow, ice, rainy day, wet and so on.It is not only suitable for a variety of outdoor activities such as hiking, running, hiking, hunting and so on. It can also be worn indoors to protect furniture.(Design for large and medium dogs.) SECURE and ADJUSTABLEEasy to put on / off. These dog shoes expands with a wide split seam opening and two adjustable and reflective velcro straps to ensure a tight fit, also make your dog safe at night. WARM NOTE This waterproof dog shoes can be hand-washed.