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Smartwool Sock Size Chart

Adult Shoe Size Chart

 U.S Mens'U.S. Womens'EuroU.K.
Small3 - 5.54 - 6.534 - 372 - 4.5
Medium6 - 8.57 - 9.538 - 415 - 7.5
Large9 - 11.510 - 12.542 - 458 - 10.5
X Large12 - 14.5n/a46 - 4911 - 13.5