Knockaround Throwback Premium Non-Polarized Sunglasses polycarbonate frame polycarbonate lens Non-polarized Lens width: 51 millimeters Lens height: 44 millimeters Bridge: 18 millimeters Arm: 143 millimeters Dimensions: 5.5in. (front), 1.875in. (tall), 5.25in. (arms) UV400 protection Matte Finish Non-Polarized lenses