Costa Del Mar Howler C-Mates Polarized Bi-Focal Reading Glasses in Tortoise & Amber Nylon frame Plastic lens Polarized Lens width: 63 millimeters Lens height: 40 millimeters Bridge: 18 millimeters Arm: 140 millimeters Comfortable large fit Stainless steel integral hinge Durable co-injected nylon frame Includes hard case Plastic lenses are lightweight, impact- and scratch-resistant