Polarized UV400 rectangle shape flip up that clips onto rectangle shape prescription glasses. Flip-ups work best for glasses that closely resemble the shape of the flip-up. It also fits best if the frame is straight across the top so that when the flip-up clamps onto your glasses it is sitting straight across the top of your glasses. Measure your glasses width x height. It is best to add about 2mm's to the height of the flip up height to accommodate for how the flip up clamps onto your glasses. It is usually okay for the flip up lens to be a little wider or higher than your glasses, it will just overlap a little.
Available Rectangle Flip-up Sunglass Sizes
One Lens 56mm Width x 40mm Height
Total Width 128mm x 40mm Height
One Lens 58mm Width x 42mm Height
Total Width 130mm x 42mm Height
One Lens 60mm Width x 44mm Height
Total Width 135mm x 44mm Height