How to measure
Use a soft tape measure around both your upper and lower calf. Age is only a starting point; the calf measurements determine the best fit. If either measurement sits between sizes, choose the larger size for more comfort.
XS — approx. under 6 (measure to confirm)
Length: 10.6 in (27 cm). Upper-calf circumference: 7.1–8.7 in (18–22 cm). Lower-calf circumference: 3.9–5.1 in (10–13 cm).
S — approx. age 6–10
Length: 11.0 in (28 cm). Upper-calf circumference: 8.7–11.0 in (22–28 cm). Lower-calf circumference: 5.1–6.3 in (13–16 cm).
M — approx. age 11–13
Length: 11.4 in (29 cm). Upper-calf circumference: 10.2–12.6 in (26–32 cm). Lower-calf circumference: 6.3–7.5 in (16–19 cm).
L — approx. age 14+ / slim adult
Length: 11.8 in (30 cm). Upper-calf circumference: 11.0–13.4 in (28–34 cm). Lower-calf circumference: 7.1–8.3 in (18–21 cm).
XL — adult
Length: 12.2 in (31 cm). Upper-calf circumference: 11.8–15.4 in (30–39 cm). Lower-calf circumference: 7.9–9.1 in (20–23 cm).
Measurement note
Supplier measurements are taken manually and may vary slightly. The sleeve should feel secure without pinching, rolling down or restricting circulation.