Ray-Ban NEW WAYFARER - BLACK Frame POLAR GRADIENT GRAY Lenses 52mm Polarized Acetate Frame. Acetate is a plant-based plastic known for being lightweight, yet durable. Crystal lens Polarized 100% UV400 protection coating Lens width: 52 millimeters Lens height: 40 millimeters Bridge: 18 millimeters Arm: 145 millimeters Slight adjustments to the shape and curvature of the sunglasses arms may be needed to get a custom fit. Adjustments should be made by a professional