Plastic frame with spring hinge Lens width about 2 5/16 inches (58mm) Lens height about 1 15/16 inches (50mm) Bridge (DBL) about 1/2 inches (13mm) Temple length about 5 1/4 inches (134mm) EYEKEEPER BIFOCAL SUNGLASSES - A crescent shape on the bottom part of the lenses have magnification, which is for reading and close-up work. And the other parts of the lenses have no magnification,which is for distance viewing.