Amber square shape non polarized driving lens flip up sunglasses that clips onto a square shape pair of prescription glasses. available in a smallest size, small, medium (most popular) and a large size (note very big).
Non polarized lenses make it easier to see your dashboard and electronic devices outside.
Measure your glasses width x height. you must add 2mm's height to the height measurement of your glasses to allow for the flip up sunglass attachment mechanism.
The shape of your glasses needs to be very similar to the square flip up clip on shape in order for the clip on to fit your glasses properly.