Cocoons Low Vision C402 MED Slim Line Sunglasses Nylon frame Polarized Polar lens Polarized 100% UV protection coating Lens width: 63 millimeters Lens height: 45 millimeters Bridge: 15 millimeters Arm: 130 millimeters Designed to fit comfortably and securely over 99.5% of all prescription eyewear frames. Medium fits over prescription frames measuring less than 5 1/4"w x 1 1/2"h .Six sizes to choose from. 360 of Protection: It is important that a sunglass provides protection from all angles. Cocoons patented frame designs block damaging UV light and glare from all angles, completely isolating the eyes in a cocoon of filtered light. Each pair includes a custom designedprotective neoprenecase, large lens cloth and a limited lifetime frame warranty. Polarized, 100% UVA and UVB Protection Lenses are prescription ready (Rx-able)