Glas Mary readers TortoiseshellMary's tortoise shell frame in black brown acetate add a stylish look without being too oversized. Good for narrower faces. Information All glasses have a CR39 lens, which is one of the best on the market and is characterized by its thin, durable construction and high optical performance. Anti fatigue Anti scratch Anti dirt Anti fog Anti reflective Lightweight Width142 mm Height47 mm Lens Width55 mm Lens Height43 mm Bridge Width21 mm Temple Length142