Length sizes -
Small - 160mm
Normal - 173mm
Both singles and straps have he potential to be offered in both sizes. This size has nothing to do with the width.
Width Sizes -
Single width 15mm
Strap width 25mm
Singles will always be 15mm while straps will always be 25mm wide.
If you need wristbands with more sizing, we highly recommend checking out our Imperials. :)