Size chart socks

Our socks are sized by your shoe size, not measured separately. A performance sock should feel snug, with no loose fabric to blister. If you're between sizes, size down for a snug fit rather than up: this matters most with Injinji, where each toe has its own sleeve. Feetures and Injinji band their sizes a little differently, so check the brand you are buying.

Feetures

Sock size	Small	Medium	Large	X-Large
US men	—	6-8.5	9-12	12.5-15.5
US women	4-6.5	7-9.5	10-13	—
US youth	Y1-Y5	—	—	—
UK	2-4.5	5-7.5	8-11	11.5-14.5
EU	34-37	38-42	43-46	47-51

Feetures socks are foot-specific (labelled L and R) except the High Performance line. Source: feetures.com.

Injinji: unisex (most styles)

Size	US men	US women	UK	EU	Foot length
S	5-7.5	6-8.5	4-6.5	37-40	23-25 cm
M	8-10.5	9-11.5	7-9.5	40.5-44	25.5-27 cm
L	11-13	12+	10-12	44.5-47	27.5-29 cm
XL	13.5+	—	12.5+	47.5+	29.5+ cm

Injinji: women-specific & men-specific

Line / Size	US	UK	EU	Foot length
Women XS/SM	5-8.5	3-6.5	35-40	21.5-25 cm
Women MD/LG	9-12	7-10+	40.5-44.5+	25.5-27.5+ cm
Men SM/MD	5-10.5	4-9.5	37-44	23-27 cm
Men LG/XL	11-13+	10-12.5+	44.5-47.5+	27.5-29.5+ cm

Injinji unisex is the most common fit; the women-specific line runs shorter in the toes and narrower in the arch. Source: injinji.com.