Ultra Paws Durable Dog Boots Measure PAW WIDTH (not boot width) Petite 1 ", X-Small 1 ", Small 2 ", Med 2 ", Large 3 ", X-Large 4" wide. Flexible, skid-resistant sole performs in wet and dry, hot and cold conditions. Easy to put on with wide split seam top opening - difficult to slip off. Velcro straps for secure closure, with generous foam to cushion the grip. Provides great traction for senior dogs or dogs who need assistance