Black cotton tabi socks! My son bought these for a festival and used them a few times. There's no size marking, but my son usually wears shoes in the 26-27cm range, so I think they're around that size. There's almost no dirt on the black parts. The inside of the tabi is also clean (photo 3). There are some dirty areas on the soles, heels, and toes (photos 2 and 4). Unless you have any special requests, I will fold them for shipping. Thank you!