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2015 CWB and Proline Wake Gear on Sale NOW.

Smartwool Sock Size Chart

 U.S Men'sU.S. Women'sEuroU.K.Calf Circumference (for Compression Socks)
Small3 - 5.54 - 6.534 - 372 - 4.511" - 14.5"
Medium6 - 8.57 - 9.538 - 415 - 7.512.5" - 16.5"
Large9 - 11.510 - 12.542 - 458 - 10.514.5" - 18"
X-Large12 - 14.5n/a46 - 4911 - 13.516" - 23"