Size S: 7 1/8"- 8 5/8" (18-22cm) * Lighter (Weight: 0.46lb / 210 grams) , better traction and more durable. * Reduce the risk of injury from slips and falls when walk on ice, snow, mud and wet grass or other poor conditions * Thermoplastic elastomer with excellent elastic & high density manganese steel to ensure the maximum durability * Easy on/off to fit boots, sneakers, casual and dress shoes-- Wrap the front around your toe section, then stretch the back around your heel