Size 51x21x145 The Ray-Ban® Hexagonal sunglasses combine an absolute first with a newly introduced retro shape: flat lenses in hexagonal. In fact, the unique flat lenses (base 2.5) take this old-school classic to a new level, resulting in a stunningly novel style that won’t let you go unnoticed. The RB3548N flat shades come in both classic colours and bold flash lenses, all paired with golden frames.