Measure around your wrist where a watch strap would lie. (Approx measurements)
X-Small = 14 - 15.2cm, (5.5”-6”)
Small = 16.5 - 17.8cm (6.5”-7”)
Medium = 19.1 - 20.3cm (7.5”-8”)
Large = 21.6 - 22.9cm, (8.5”-9”)
X Large = 24.1 - 25.4cm, (9.5”-10”)
Sizes of products may vary between manufacturers and even between different designs by the same manufacturer. The size charts should be used as a general guide.