1. Wrap either a Tape Measure, Piece of String or Paper around your Wrist.
(as shown in images above)
2. Make sure it is a Snug-fit and not too tight.
3. If using String or Paper mark where the end is and then measure against a Ruler.
For a Snug Fit:
Select the *Exact Number of your Measurement
For a Looser Fit:
*Add 1/2 Inch = 1.27cms (or slightly more if preferred)