PenSee Optical Large Oversized Oval Round Light Metal Eye Glasses Frames metal frame interchangeable lens non-polarized Lens width: 51 millimeters Arm: 145 millimeters Size:Lens Width:50mm,Lens Height:46mm,Brige:19,Total Length:146mm Open Metal Frame Design: Optical Prescription Lens Change Aviailable.You can change your own Optical Prescription lense. Light Weight Soft All Metal Go to the Optics or your Eye Dr.,ask for your Prescription/Magnification/Minification Strength. Consider use as a Clear Lense Frames Accessories it is also Great!