Non polarized UV400 amber copper driving lens flip up that clips onto a square shape pair of 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.
Measurement One Lens 60mm Width x 47mm Height Total Width 130mm x 47mm Height