Under Armour Socks Sizing

Sock Size Shoe Size
  Youth US/AU Women US Men AU Men
Small - 4-6.5 - -
Medium 10.5-13.5 7-10.5 4-8.5 3-7.5
Large 1-4 11-13 9-12.5 8-11.5
XL - - 13-16 12-15