From the top of the wall mount of this large antique brass bulkhead light with brass rain cap to the bottom of the cage, this light measures 14 inches long. The brass rain cap cover that we added measures 9 inches wide and now has a rolled outside edge. The four screw holes measure 5 1/4 inches on center of each other.  The base itself measures 4 5/8 inches from one outside edge to the other. When mounted to the wall, this large antique brass bulkhead light will extend out from the wall by 10 inches. This light weighs 11 1/2 pounds, and is 100% cast brass. You can use this light inside or outside – it will never rust!