What do you get when you cross a circle with a square? You get the hexagonal RB 3548N, the evolution of round featuring flat crystal lenses. Round meets flat, when it comes to lenses that is. This hexagonal round metal shape features thin coined profiles and flat crystal lenses on classic gold with extremely thin temples. Eye size: 51; Frame: Polished Arista Gold; Lens: Polarized G-15 Green; Lens Material: Polarized Glass