Megi Waterproof Pet Boots for Medium to Large Dogs Labrador Husky Shoes 4 Pcs XXXXL 8.7 x 8cm (3.43 x 3.15inches);Cute pet paw Embroidery Molded rubber bottom: non-slip and waterproof Elastic straps with reflective tape for safely walking at night To measure the width and length of your dog's foot:place the foot on a piece of paper and press down on the top of the foot, mimicking how the foot spreads when the dog's walking.Mark the left-right,front-back side of the foot on the paper and measure the distance between the marks.In order to get the exact data, four of your dog's paws need to be measured,please close to your dog's paws and use the longest and widest one. It is the sole size, please choose the shoes with size a little larger than paw size (around 0.2"-0.3" larger)