Slim Metal Rx Frames Durable Prescription Ready Clear Lens Glasses Spring Hinge Metal frame Polycarbonate lens Non-Polarized Lens width: 56 millimeters Lens height: 33 millimeters Bridge: 18 millimeters Arm: 140 millimeters Prescription ready glasses, lenses are meant for replacing. Some lenses may come with dimensions written on the lens. Classic Squared Design with Spring Hinges Durable Metal Materials Flexible and comfortable feel 30-Day Money Back Guarantee