The clock measures 14 inches across. The outer lens is made from high quality optical lexan. The advertisement face is cut out by a CNC router and the image is placed with a UV dried computer controlled printing process that will last for many years. The back of the clock is made from black ABS plastic that houses a 22 watt fluorescent circleline bulb with an on/off switch in the cord. The clock is a battery operated quartz movement that runs from one AA battery (not included). This sign is awesome when lit! This is a must for any collector and would look great in your home, office or garage.