This style of bifocal safety glasses gives all the protection of a safety glass but has a very classy styling to accompany its functionality. It has a bifocal placed inside the tinted lens to give you the ability to read maps, gauges, etc. The rest of the lens curves snugly around your eyes for protection from road debris and sun. Frame Measurements: 5 1/2" x 1 5/8" (temple to temple x height of lens)