hipaw summer breathable dog boots nonslip sole paw protector for hardwood floor hipaw <b>size chart (inner sole)</b><br> small ( insole: 2.15"w )<br> medium ( insole: 2.35"w ) <br> large ( insole: 2.55"w ) <br> xlarge ( insole: 2.83"w ) <br> xxlarge ( insole: 3.15"w ) <br><br> <b>how to measure:</b><br> 1. have your dog stand on blank paper. <br> 2. <b>trace the left and right side of paw. mark and measure the widest point by ruler.</b> <br> 3. refer to the size chart to choose the applicable size. <br><br> note: <br> *for the best fit, match the size in the size chart to your pet’s measurements as closely as possible.