Slim rectangle shape polarized flip up that clips onto rectangle shape prescription 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.
One Lens 54mm Width x 32mm Height Total Width 122mm x 32mm Height
One Lens 56mm Width x 34mm Height Total Width 125mm x 34mm Height
One Lens 58mm Width x 36mm Height Total Width 132mm x 36mm Height
One Lens 60mm Width x 38mm Height Total Width 136mm x 38mm Height
One Lens 62mm Width x 40mm Height Total Width 140mm x 40mm Height