Thorlos Unisex Socks Size Chart
X-Small Small Medium Large X-Large
US Men's shoe size N/A 5.5-8.5 9-12.5 10.5-13 13+
US Women's shoe size 4-6 6.5-10 10-13 13+ N/A
European shoe size 33-37 37.5-42 43-46.5 44-48 48+
These are general guidelines only, sizes are not guaranteed. But no worries, since at SunnySports we offer our exclusive PFF Guaranty