Ray-Ban Round Metal RB3447 delivers a classic round silhouette in a slim metal frame, designed for versatile everyday sun protection and easy prescription compatibility. Key attributes: Black | Green | Metal | UV protection | Non-polarized lenses | Prescription-compatible | Adjustable nose pads | Key bridge | Slim metal temples | Round shape | Thin metal frame | Engravings on bridge and temples | Full rim | Dimensions & fit: Lens width: 53 mm | Bridge width: 21 mm | Temple length: 145 mm | Narrow fit | Composition & care: Frame: Metal | Wipe lenses with a microfiber cloth and mild lens cleaner. Store in the protective case when not in use. Avoid abrasive cleaners and prolonged exposure to heat.