<p><b>Size:</b></p> <p>Small(Neck:8.7''-10.6'')</p> <p>Medium(Neck:14.5''-17.7'')</p> <p>Large(Neck:14.7''-18.1'')</p> <p>X-Large(Neck:19.2''-24.4'')</p> <p> </p> <p><b>Material:</b></p> <p>Waterproof oxford cloth material </p> <p> </p> <p><b>How to use:</b></p> <p> </p> <ul> <li> Slide the pet’s daily collar through the elastic ring</li> <li> Clasp the product around the pet’s neck and buckle up the collar</li> </ul> <p><b> Note:</b></p> <ul> <li>Please measure your dog's neck circumference according to our size picture instructions</li> <li>If your dog's measurement is close to the maximum please order the next size up</li> </ul>