These are crew socks for kindergarteners at Kids Duo International Kindergarten. Normally sold in a set of two, this is a single sock. Size: 15-17 cm I bought these as spares and have kept them at home, unused. ⚠️ Although new, there is some staining on the label. ⚠️ Please understand that these have been stored at home, so only purchase if you are okay with that.