Costa Del Mar Bomba C-Mates Polarized Bi-Focal Reading Glasses in Black & Amber Nylon frame Plastic lens Polarized Lens width: 61 millimeters Lens height: 40 millimeters Bridge: 14 millimeters Arm: 118 millimeters Comfortable large fit Stainless steel integral hinge Durable co-injected nylon frame Includes hard case Plastic lenses are lightweight, impact- and scratch-resistant