3" Diameter clock. This elegant looking clock face enhances the classic look of the Tall Desk Clocks (Item 5648 and 5649) or our Clock Plate (Item 5615.) The outside diameter of the gold bezel ring is 3-1/2" and the 3" diameter Quartz Movement case fits perfectly into the 1" deep mounting holes provided on all Clock blanks. It's a perfect marriage. Uses a single AA battery.