Frame material: polycarbonate with spring hinges, high quality and durable. Usable strength / diopter: +1.0, +1.5, +2.0, +2.5, +3.0, +3.5. Blue light lens to protect eyes from harmful blue light. Classic design and fashionable color combination for men and women. Round shape suitable for all ages and face shapes. Dimensions: Lens width: 52 mm, Lens height: 36 mm, Nose bridge: 14 mm, Arm length: 135 mm, Frame length: 140 mm, Glasses weight: 22 g.