Traction boots are designed to prevent slipping on hardwood or tile floors and for outside light duty on snow and grass. Eight sizes - from very small to very large dogs - with our patented comfort foam pad to keep the boot on, with a generous traction patch on the sole! Measuring - Place the paw on a piece of paper and press down on top mimicking how the paw spreads when the dog is walking. Mark the left and the right side on the paper and measure the distance between the marks. Compare this to the boot sizes. The width of the paw can be the same or slightly larger than the boot because Traction boots will stretch.