Our HydroFlex straps are suitable for wrists in the range 6.1" to 7.3".

For wrists greater than 7.3” and smaller than 7.75”, you may be wearing it on the second-to-last to last hole. 


  • The wrist size refers to the circumferential measurement of the wrist at the point where you would normally wear your watch.
  • The length guide is approximate only and applies to the straps as shown in the images. Variations in fitment may occur due to differences in wrist shapes, buckle/clasp types and watch case sizes/shapes which cannot be accounted for completely.
  • No consideration has been given to differences in hand size/structure, as this may further impact fitment.