Khan Reading Glasses Mens Gafas De Lectura Rectangle Nerdy Sturdy 51 Mm Readers plastic frame composite lens non-polarized Lens width: 51 mm Lens height: 43 mm Bridge: 15 mm Arm: 139 mm Reading Glasses Frame: High Impact. Lens: Clear with Magnification Compliance: Exceeds 86/686/EEC-EN1836-1997 Impact Resistance.