CIPA's Economy Marine Mirror measures 2.5 x 8 inches and has a convex mirror surface (not glass) to provide a wide viewing angle. The universal quick mounting system gives this mirror multiple mounting options. It can be mounted above or below the windshield, or to the dashboard. Windshield installation is easy and requires no tools. Fits round or square frames up to 7/8. The Economy Marine Mirror helps to eliminate blind spots, and provides added safety and situational awareness with a euro styling.