Thank you for viewing. This is the VANTELIN Medical Idea Supporter for calf assistance. The size is M. I used it once, but the pain in my leg disappeared immediately, so I am selling it. It will be shipped without the box. It is a beautiful item, but please refrain from purchasing if you are nervous about home storage. It firmly supports with a patented taping structure. Based on taping theory, it suppresses excessive shaking of the gastrocnemius muscle, reduces the burden on the legs, and supports easy leg movement when walking. * Calf circumference: Approximately 32-37 cm Thank you for your purchase if you understand that this is a home-stored item.