Size	Small	Medium	Large	X-Large	Calf Circumference
US Men	3–5.5	6–8.5	9–11.5	12–14.5	Up to 16.5*
US Women	4–6.5	7–9.5	10–12.5	13–15.5	Up to 16.5*
Euro	34–37	38–41	42–45	46–49	Up to 16.5*
UK	2–4.5	5–7.5	8–10.5	11–13.5	Up to 16.5*