Size 2: 2.75" x 2.16" (L*W) for 18-27 lbs; Ideal for Poodles, Schnauzers, Pugs, West Highland Terriers, etc. Please refer mainly to the width of the dog's paw in the picture.Choose the right size foryour puppy. in the size chart. Adjustable: easy to put on and take off. The non-slip sole with reflective strips provides stability and traction to help your dog walk safely at night. Waterproof: The upper is made of microfiber, which can be easily protected from rain and artificial splashes. But the shoes are not completely waterproof and cannot be used in deep water or sand, because theseam pinholes may ooze water or fine sand. COMFORT: Flexible and waterproof, so the boot can be used indoors or outdoors, warm and cold in wet and dry conditions. Protects against sharp thorns and hot cobblestones. Effectively protects the dog's pawsheat, stones, glass, etc. Soft claws of winter snow, ice, salt. Size 2: 2.75" x 2.16" (L*W) for 18-27 lbs; Ideal for poodles; Schnauzers; Pugs;