Plastic frame plastic lens non-polarized Lens width: 53 millimeters Arm: 140 millimeters DIMENSION:Lens width:53MM,Bridge:18MM,Arm length:140MM MATERIAL:Plastic, which has the characteristics of super lightness, abrasion resistance, low friction coefficient and so on. It can effectively prevent the damage to the eyes and face caused by the fracture and friction of the eyeglasses frame in the movement,metal hinge is more stable TIJN Unisex Stylish Square Fake Glasses Optical Eyewear Clear Lens Women Men Computer Eyeglasses - BURD1AHLZ