Typically start at 7” for small wrists, 8” for medium wrists and 9” for bigger wrists.
Typically start at 6” and up to 8” for bigger wrists.
If you're completely unsure, follow these 3 easy steps:
Find any string/wire and a ruler.
Wrap the string/wire around your wrist and pinch where the ends connect.
Place the measured string/wire next to a ruler and you will see your wrist size.