To measure your wrist size you need the following:
a piece of string
a ruler
a pen
and of course a wrist


you can also use a tape measure

As you can see on the image the size should be measured just behind the 2 bones of the junction between your hand and wrist.

When you have put the string around your wrist, draw a dot at the point where the end meets.

Put the piece of string along the ruler and pull the string tight.

Record the size:

Measure the length from the end to the dot (in centimeters or inches). Now select the nearest size from the drop down menu on the shoppingcart page.