![4u_us_80_tortoise_ref 4u_us_80_tortoise_ref](https://atttpgdeen.cloudimg.io/cdn/n/n/http://ca.masterdb.co.uk//images/4u/4u_us_80_tortoise_ref.jpg)
Alternative Colours
4u Us 80
$120.00
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Premium eyewear
Alternative Colours
Frame Size Guide
Sample Sizing:
![size-values size-values](https://shop.cristallopticians.ca/wp-content/uploads/2020/03/size-values.jpg)
Frame measurements are listed in mm (millimeters)
If you wear glasses and have a pair already, check the inner side of the temples (arms), you may find the size information stamped.
![size-guide size-guide](https://shop.cristallopticians.ca/wp-content/uploads/2020/03/size-guide.jpg)