These gaiters are good for hiking, walking, backpacking and skiing. They are made of durable waterproof materials to sustain harsh weather. Pair these gaiters with hiking boots or ski boots to keep rocks, dirt and snow from getting into your footwear. These gaiters fit most US shoe size 5-6.5, European shoe size 35-37. Use the following measurements as guide when choose size. Detailed measurements * Front length: 13 inch (33 cm) * Top opening circumference: 15.5 inch (40 cm) * Calf circumference: 15 inch (38 cm) * Ankle circumference: 13.5 inch (34 cm) * Bottom opening circumference: 16 inch (41 cm) Weight: 7-8 oz per pair. Check our other listings for medium and large size.