Costa Del Mar Brine C-Mates Polarized Bi-Focal Reading Glasses Nylon frame Plastic lens Polarized Lens width: 59 millimeters Lens height: 35 millimeters Bridge: 19 millimeters Arm: 133 millimeters Comfortable large fit Stainless steel integral hinge ; Durable co-injected nylon frame 100% UV light blockage for max protection. Includes hard case Plastic lenses are lightweight, impact- and scratch-resistant