PRODUCTS SIZES: Lens width: (51mm), frame width: (134mm), lens height: (35mm), bridge (DBL): (17mm), temple length: (138mm). Frame material: plastic. Spring Hinge: Yes LIGHTWEIGHT AND DURABLE: Lightweight frames and plastic lenses with flexible spring hinge temples ensure a comfortable fit without uncomfortable compression and clear vision. They work really well if you can't read those fine prints on newspapers etc. Each reading glasses is carefully selected to ensure quality READING LENSES: 2 pairs of lenses at an affordable price - we offer you excellent value for money for a quality product. Extremely light and do not cause stress when worn for a long time The practical set allows you to store a pair of reading glasses in different places so you always have a pair at hand. They are also a perfect gift for your parents and the elderly