Ray-Ban NEW WAYFARER - HAVANA Frame POLAR GRADIENT BROWN Lenses 55mm Polarized Acetate Frame. Acetate is a plant-based plastic known for being lightweight, yet durable. Plastic frame Plastic lens Polarized Lens width: 55 millimeters Bridge: 18.6 millimeters Arm: 145 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