I only used these once last year when I was discharged from the hospital. I purchased them at an authorized store in a department store. They are very clean, so I think they can still be worn! I took pictures of both sides. 【Brand】 ● Familiar 　familiar 【Socks Size】 ● Size: 7-9cm I think it's around 8cm as there is no specific notation. I used them with care, so I would be happy if I could pass them on. Thank you for looking.