These are rush grass tatami beach sandals/slippers! They can also be used as indoor slippers. Sizes are for men (approx. 27.5cm) and women (approx. 25cm), which feel like a slightly larger and regular free size, respectively. Although they are unused, I opened the package for the listing. There may be some overlooked dirt or imperfections. I would appreciate it if you could understand and accept that they are stored at home by a private seller. I look forward to hearing from you.