Sizing for JOBST Activa CoolMax knee-length athletic socks — unisex fit. Toggle inches/cm and tap a measurement to highlight your size from JOBST's official sizing data. Use the built-in Find-my-size calculator to get a recommendation from your measurements.
JOBST Athletic Knee High Size Chart
Activa CoolMax · knee-length athletic — unisex
Tap any measurement below to see your full size details.
👆 Tap a value in the table to highlight your size.
Circumference
| Measure | S | M | L | XL |
|---|---|---|---|---|
| Calf Circumference (cC) | 29-38 cm11¼-15 | 30-42 cm12-16½ | 32-46 cm12½-18 | 34-50 cm13½-19½ |
| Ankle Circumference (cB) | 18-22 cm7-8¾ | 22-25 cm8¾-10 | 25-29 cm10-11½ | 29-33 cm11½-13 |
S
Calf Circumference (cC)
29-38 cm11¼-15
Ankle Circumference (cB)
18-22 cm7-8¾
M
Calf Circumference (cC)
30-42 cm12-16½
Ankle Circumference (cB)
22-25 cm8¾-10
L
Calf Circumference (cC)
32-46 cm12½-18
Ankle Circumference (cB)
25-29 cm10-11½
XL
Calf Circumference (cC)
34-50 cm13½-19½
Ankle Circumference (cB)
29-33 cm11½-13
Need help choosing your size?
Our Certified Fitters are standing by. Mon–Fri 8am–7pm CST
📞 1-800-504-7315
Between sizes? Size down for a firmer therapeutic fit, or up for easier donning. It should feel snug — like a firm, even hug.
Wrong size? No problem. Easy exchanges — we’ll get you into the right fit.
Measure first thing in the morning, before swelling, with a soft tape measure held level. Applies to: Activa CoolMax · knee-length athletic — unisex. Step-by-step Measuring Guide →
