Size:1#:L*W4.3*W3.4CM 2#:L*W4.6*W3.6CM 3#: L*W5*W4.2CM 4#:L*W5.4*W4.3CM 5#: L*W5.8*W4.7CM This small knotter can be cut cleanly nails. Prepare your pen, paper, and tape measurements, and then ruler. I ask you to stand on a 4-legged dog with a foot to measure the paper. And those who put on the paper put a little weight on the feet you are measuring, and lift the opposite feet. You can use a pen and nail on the outside of your foot. Measure the longest part such as vertical and horizontal rulers, please choose the closest look in the dog shoe size chart. Note 1, Compare the measurements of the sizing chart. Different size shoes are different , please check before you buy it. 2. Please check the size of the table to buy a larger size than a small dog paw. The sole is waterproof but cannot be used in deep water or sand.