These are a pair made from kimono fabric (komon). Size: 23.5cm, width 9.5cm They are firmly woven, so they are durable. They may feel tight when you first wear them, but they will gradually conform to your feet. If you want to tighten them, you can adjust them on the underside. You can wash them if they get dirty. Hand wash (do not rub) or machine wash (using a net). Dehydrate them, shape them, and hang them to dry. Thank you for looking.