SizeInsole Dimension:Size1 Insole Dimension: L: 1.38'' W: 1.02'' Reference weight 1-3.3lbSize2 Insole Dimension: L: 1.57'' W: 1.18'' Reference weight 4.4-6.6lbSize3 Insole Dimension: L: 1.77'' W: 1.34'' Reference weight 7.7-9.9lbSize4 Insole Dimension: L: 1.97'' W: 1.50'' Reference weight 11-13.2lbSize5 Insole Dimension: L: 2.17'' W: 1.65'' Reference weight 14.3-16.5lbFeatures: 1. Convenience fasteners straps keep shoes on through all the activities. 2. For cleaning, the dog shoes are hand washable and dried naturally in the air. 3. Expandable closing system with velcro fasteners make them easy and quick to put the shoes on and off. Correct measurement method:1. Place the paw on a piece of paper and press down on the top, mimicking how the paw spreads when the dog is walking.2. Mark the left and right sides on the paper and measure the distance between the marks.3. Choose size according to width is better, the width of the paw should be smaller than the boot size chart.Package Include:1 x pet shoes(4 pieces)Warm tips: