AO Sunglasses Original Pilot Bayonet Gold Frame CC Gray Poly Lens 55mm

The U.S. Armed Forces’ best-kept secret now available in the consumer market. Performance-tested sunglasses with classic aviator styling. The Generalhas been a favourite of U.S. military pilots for more than 50 years. Engineered to rigid military specifications and issued to millions of U.S. Soldiers Sailors Marines and Airmen since 1958. The rugged and sturdy structure and high quality finishing of the steel alloy frame coupled with distortion free toughened and polished True Colour glass lens have made the AO Flight GearCollection the standard bearer of all fine military sunglasses. To measure for frame sizing; First stand in front of a mirror. Second Hold a ruler so one end is lined up with your right temple and the ruler goes over the bridge of the nose. Third measure distance between your temples to the nearest 1/4 inch. For better accuracy measure to 1/8th inch. Keep ruller straight avoid bending ruler. For Frames 52mm-up to 5 inches. For frames 55mm 5 inches to 5 1/2 inches. For 57 and 58mm-5/12 to 6 inces. Please note temple lenght is determined by frame size.