Coastal Pet Size Right Adjustable Harness Red 18 to 24 Inches Girth with a Width of 5/8 in. Comfort fit pad on the top has a swivel ring. Once it&rsquo;s adjusted it&rsquo;s particularly quick and easy to put on &ndash; slip over head and snap. Mearsure girth directly behind your dogs elbows for a perfect fit.