The size is L. It has not been used for competitions, etc. I am selling it because I no longer ride a bicycle. These are winter shoe covers that are suitable for temperatures of 5°C. They use "Windbreak®" material, which combines windproof and heat-retaining properties, and are a standard winter shoe cover item with an easy-to-use zipper. Reflective elements on the toes, sides, and heel ensure visibility at night.