CHOICE GUIDES
To find out if you need an S or L-shaped retainer strap, here are some tips:
- Measure the width of the tip of the temple of your glasses.
If it is between 5 and 7mm wide, then you will need size S.
If it is between 7 and 10mm wide, then you will need size L.
-Feel free to try out the retainer strap with your pair own of glasses in store.