This rubber slip-on gripper fits the Rotator sole and most wide soled running shoes. This gripper fits the left shoe and provides traction on the ice. It can also be used to protect your slider.Size chart:XS-Women's sizes 5-7.5 & Junior sizes 3-5SM-Women's sizes 8-10 & Junior size 6MED-Women's sizes 10.5-11 & Men's sizes 7-9LARGE-Men's sizes 9.5-11XL-Men's sizes 11.5-14For running shoes sizing may vary slightly. It is important to ensure your gripper fits snug so it will not slip off.