How to choose the correct size?

Small Medium Large
Calf circumference 29 – 39 cm 35 – 51 cm 40 – 58 cm
Ankle circumference 14 – 29 cm 22 – 40 cm 30 – 45 cm
Shoe sizes (for ortientation purposes only)
EUR 35 – 40 40 – 45 45 – 50
UK 2 ½ – 6 ½ 6 ½ – 10 ½ 10 ½ – 14
US (F) 4 ½ – 8 ½ ½ – 12 ½ 12 ½ – 16
US (M) 3 ½ – 7 ½ 7 ½ – 11½ 11 ½ – 15