<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>