Smartwool Socks Size & Fit Guide

Men's
Size	S	M	L	XL
U.S. Men's Shoe Size	3-5.5	6-8.5	9-11.5	12-14.5
Euro Shoe Size	34-37	38-41	42-45	46-49
UK Shoe Size	2-4.5	5-7.5	8-10.5	11-13.5
Calf Circumference (Largest part of the calf)	11"-14.5" (18-26.5 cm)	12.5"-16.5" (32-41 cm)	14.5"-18" (37-45.5 cm)	16"-23" (41-58 cm)

Women's
Size	S	M	L	XL
U.S. Women's Shoe Size	4-6.5	7-9.5	10-12.5	N/A
Euro Shoe Size	34-37	38-41	42-45	46-49
UK Shoe Size	2-4.5	5-7.5	8-10.5	11-13.5
Calf Circumference (Largest part of the calf)	11"-14.5" (18-26.5 cm)	12.5"-16.5" (32-41 cm)	14.5"-18" (37-45.5 cm)	16"-23" (41-58 cm)

Kid's
Size	XS	S	M	L
U.S. Shoe Size	6-8.5	9-11.5	12-2.5	3-6
Euro Shoe Size	22-25	26-28	29-32	33-36
UK Shoe Size	5-7.5	8-10.5	11-13.5	1-4.5