Welcome to the land of not your average socks!!
Most popular socks size is for kids age 6 - 99 or One Size Fits Most.Suitable for Kids and Teenagers age 6 and up.
MadMia socks do fit Adults, however it is recommend to fit up to shoe size EU 41 (equivalent to womens size 8/9 AU).
Please note, the socks do have limited stretch around adult muscular calves.