The best way is to measure your glasses is in Millimeters total width x total height. As a general rule add 2mm's to the height and width to help make up for how the flip-up attaches to your glasses.
Rectangular Polarized Flip Up Sunglasses
$ 16.25
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Polarized UV400 rectangle shape flip-up and that clip onto rectangle shape prescription glasses. Available Sizes ...
Rectangle Non Polarized Amber Flipup
$ 16.25
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Non polarized UV400 amber driving lens rectangle shape flip up that clip onto rectangle shape...
Flip-up Slim Rectangle Polarized
$ 16.25
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Slim shape rectangle flip-up with polarized lenses. The lenses are very close to a true...
Square Polarized Flip Up
$ 16.25
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Polarized UV400 flip up that clips onto a square shape pair of prescription glasses. Small...
Amber Square Non Polarized Flip Up
$ 16.25
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Non polarized UV400 amber copper driving lens flip up that clips onto a square shape...
Polarized Round Shape Flip Up
$ 16.25
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Semi round shape polarized gray, amber, brownish amber & lite yellow lens flip ups. This flip up...
Non Polarized Round Flip Up Sunglasses
$ 16.25
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Semi round non polarized flip up sunglasses. The lenses are polycarbonate, scratch resistant and rated...