Onyx Weightlifting Wrist Straps Size Chart
Take a measuring tape and wrap it around your wrist where your strap will sit. Alternatively take a piece of twine or string to tie around your wrist and measure against a ruler.
* Notes: There is sizing flexibility between the wraps depending on how much wrist coverage you want. If you want more of the curvature up the back of your hand, go with the Medium or Large. If you want a minimal feel at your wrist with less curvature, go with the Small. The size of curvature on the Medium and Large is the same.
If your wrist measurement fits both the Medium and Large, you can purchase either, the Large will have a slightly longer tail than the Medium.