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Under Armour Socks

  US YOUTH SHOE SIZE US WOMEN' S SHOE SIZE US MEN'S SHOE SIZE EURO SHOE SIZE UK SHOE SIZE INCHES CM
0-6M 0K-2K     up to 17.5 up to 1.5 up to 3 1/8 up to 8
6-12M 2K-4K     17.5-19.5 1.5-3.5 3 1/8 - 4 8-10
12-24M 4K-7K     19.5-23.5 3.5-6.5 4-5 1/8 10-13
2-4T 7K-10.5K     23.5-27.5 6.5-10 5 1/8- 6 5/8 13-16.5
4-6 OR XS 10.5K-13K     27.5-31 10-12.5 6 5/8 - 7 5/8 16.5 - 19
SM 13.5K-4.5 4-6 31.5-36.5 13-4 7 5/8 - 9 1/4 19-23.5
MD 4.5-7 6-10 7-8.5 36.5-42 4-7.5 9 1/4 - 10 3/8 23.5-26.5
LG   10-14 8.5-13 42-47.5 7.5-12 10 3/8-12 1/8 26.5-31
XL     13-16 47.5-50.5 12-15 12 1/8- 13 1/4 31-34
OSFM   5.5-12   36-44.5 3.5-9.5 8 7/8 - 11 1/8 22.5 - 28.5