I'm selling these socks because my child only wore socks of different colors, and they've outgrown these. Some may have been tried on once. I don't remember exactly, but I think the size is between 15cm and 20cm. However, some socks don't have the size written on them, so it's not certain. There is a small stain (please check the 4th photo). I'm a private seller, so there may be oversights, but I appreciate your understanding. Please refrain from purchasing if you are concerned about minor details, as these have been stored at home. I generally plan to ship the day after purchase, but I may ship on the same day.