AO Eyewear Online only sells U.S. manufactured, new and in the box AO product. The rugged and sturdy structure and the high quality finishing of the metal alloy frame coupled with distortion free, gray lenses have made these sunglasses the standard against which all others are compared. These sunglasses provide 100% UV A/B protection. They are engineered to rigid specifications. These are performance tested sunglasses with classic aviator styling. The lenses are 55mm across (5 4/8 inches between the temple hinge screws). If you are taller than 6 feet or have a very wide head, we recommend that you purchase the 55mm or the 57mm size.