Our size number is US shoe size. Your foot size is not same as your shoe size. We recommend you will get Tabio socks in size smaller than your shoe size by 0.5-1 because we make our socks with much more yarns than other brands and they stretch well. (ex.) For women who wear shoes in size 8, the socks in size 5-8 (not 7-10) are better.

Women	Men
4-6
6-8	(5-7)
(8-10)	7-9
(10-12)	9-11
	11-13