I purchased these on Mercari in February, but I ended up buying four pairs in the same color and won't be using two of them, so I'm listing them for sale. Below is the product description from the original listing: Brand new, unused, authentic product. Purchased in January from the official website. Unisex. [Product] Pitsole [Size S] (23.0 - 24.5 cm) [How to Use] 1. Remove the original insole. 2. Place the Pitsole on top of the original insole, aligning the heels. 3. Trace the excess material at the toes with a pen, etc., and mark it. 4. Cut off the excess material with scissors, etc. 5. Insert into your shoes and check the fit. Size...23.5cm