ABOUT 5 3/8 DIAMETER INCLUDING THE FLARED BRASS BEZEL. ABOUT 4 1/2 DIAMETER WITHOUT THE FLARED BRASS BEZEL. ABOUT 4 DIAMETER FOR THE CLOCK FACE ITSELF.A KEY IS INCLUDED BUT DON'T THINK IT IS ORIGINAL. The item "CHELSEA SHIPS BELL CLOCK & BAROMETER SET WITH WOOD STAND 4 1/2 BOSTON 1980-84" is in sale since Saturday, January 2, 2021. This item is in the category "Antiques\Maritime\Maritime Clocks". The seller is "completelybaffled" and is located in Leawood, Kansas. This item can be shipped to United States.