This vintage brass nautical ceiling passageway light is about 8 inches tall. The widest point of the light is about 5 inches wide. The base has two mounting lugs that are 3 3/4 inches off center of each other.  To access the bulb, you spin off the top section of the light. This light was designed to be a ceiling light, but it can also be mounted with the glass pointing up. This light weighs about 3 1/2 pounds. The globe is glass.