Costa Del Mar Cocos C-Mates Polarized Bi-Focal Reading Glasses Metal frame Plastic lens Polarized Lens width: 59 millimeters Lens height: 46 millimeters Bridge: 16 millimeters Arm: 125 millimeters Comfortable large fit ; Includes hard case Integral hinge. Corrosion-resistant Monel frame. 100% UV light blockage for max protection. Plastic lenses are lightweight, impact- and scratch-resistant