For men:

Typically start at 7” for small wrists, 8” for medium wrists and 9” for bigger wrists.

For women:

Typically start at 6” and up to 8” for bigger wrists.

If you're completely unsure, follow these 3 easy steps:

Step 1:

Find any string/wire and a ruler.

Step 2:

Wrap the string/wire around your wrist and pinch where the ends connect.

Step 3:

Place the measured string/wire next to a ruler and you will see your wrist size.