These are room socks with a fleece lining. They have not been used. I removed the tag intending to use them. I measured them at 23cm, but they stretch, so I think they would fit up to about 25cm. Please refrain from purchasing if you are not comfortable with used items, as they have been stored at home. I also have children's clothing (for boys and girls), men's golf wear (Pearly Gates, Munsingwear, pants), women's accessories, and other fashion items for sale, so please take a look.