Costa Del Mar Tuna Alley C-Mates Polarized Bi-Focal Reading Glasses Nylon frame Plastic lens Polarized Lens width: 62 millimeters Lens height: 40 millimeters Bridge: 13 millimeters Arm: 115 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