Ultra Paws Traction Dog Boots With a new comfort foam pad to keep the boot on Now with a larger traction sole Designed to prevent slipping or for outside light duty on snow Place the paw on a piece of paper and press down on the top, mimicking how the paw spreads when the dog is walking.<br> Mark the left and right sides on the paper and measure the distance between the marks.<br> Compare this to the boot sizes: XX-Petite 1&#034;, X-Petite 1 1/4, Petite 1 1/2&#034;, X-Small 1 3/4, Small 2 1/4, Med 2 3/4, Large 3 1/4, X-Large 4 wide. Loosely fasten Velcro closure<br> Wash in cold water and set to delicate cycle<br> Hang to air dry