We've taken your run-of-the-mill skull and added 35% more angst and 20% more anguish to make these the nastiest mirrors on the street. Overall, the mirror head is about 3" x 4" with round glass 3" in diameter. The smoothly arched stem positions the center of the mirror head about 4-3/8" above and 5-1/2" outboard of the mounting point on the handlebar control. Hardware for a variety of H-D mounting applications is included. Mirror Adapters (P/N 1411, 1413, or 1458) required for installation on Metric Bikes.