vital-fri protective inflatable collar for dogs and cats - soft recovery pet cone, e-collar does not impede vision (l) vital-fri <p>how to use the dog surgery cone?</p><p></p><p> 1.inflate the collar via air hole. please put the zipper together when inflates.</p><p> 2.adjusting the strap for a perfect fit.</p><p> 3. insert your dog's collar through the inner ring loops when you go out with your dog.</p><p></p><p>size chart:</p><p>small= neck circumference 5"-8"</p><p>medium=neck circumference 9"-12"</p><p>large=neck circumference 12"-18''</p><p>x-large= neck circumference 19"-25''</p><p>please measure your pet's neck girth before ordering!</p>