Ray-Ban RB3016 Classic Clubmaster Sunglasses Metal Frame. Imported Plastic frame Crystal lens N 100% UV protection coating Lens width: 52 millimeters Lens height: 43 millimeters Bridge: 21 millimeters Arm: 140 millimeters Sunglasses featuring 100% UV protection coating with etched "RB" on left lens Lens width: 51 mm, lens height: 43.9 mm, bridge: 21 mm, arm: 145 mm Protective case included Prescription-ready lenses The shape and curvature of these sunglasses may need adjustments. Adjustments should only be made by a professional.