Square Aviator Bifocal Sunglasses with Hd Vision Blue Blocker Lenses. metal frame Composite lens non-polarized Lens width: 52 millimeters Lens height: 34 millimeters Bridge: 20 millimeters Arm: 133 millimeters Durable High Nickel MemoryFlex frames Equipped with Durable Spring Hinges to retain the original shape UVA and UVB Protection High Color Contrast Clear HD Vision Free Microfiber Cleaning Case