The length of the wristbands can be adjusted. The leather straps are 20 cm long and have holes for the clasp and work basically like a belt. The length of mesh bracelets can be adjusted by using the clasp. So, the mesh bracelets are between 16 and 22 cm long. This means that the watch will fit almost any wrist. The instruction manuals and this video explain how to adjust the length of your mesh bracelets.