A Square Aviator Style Featuring Inside Windsor Tortoise And Colored Acetate Rims With Semi-Flat Lenses. Product Details Eye 54mm, Bridge 19mm, Temple 145mm Stainless Steel Frame With Acetate Windsor Rims Polarized Semi-Flat CR39 Lenses With UV Protection And AR Coating In Semi-Flat Hunter Polar Clamp-On Nosepads With Adjustable Metal Arms Standard GLCO Case