<p><b>SIZE:</b></p> <ol> <li>Adjustable Height up to 35"</li> <li>Heavy Duty Clamp up to 2.5"</li> <li>Small/Medium No Sit Haunch Holder 19" and 21"</li> </ol> <p> </p> <p><b>TIPS：</b></p> <p>We provided two straps, please choose straps per your dog situation.</p> <p>Two straps do not need to be used at same moment.</p> <ul> <li>If your dog is steady, So you may just use the nylon leash to hold his neck.</li> <li>If your dog gets nervous, moves up and down, you may use the no-sit hauch holder.</li> </ul>