THE DIAL IS 5 7/8 INCHES IN DIAMETER. ARBORS TO ARBOR 3 1/8; ARBOR TO CENTER SHAFT 2 INCHES; CENTER SHAFT TO F/S ADJUSTMENT 3/4 INCHES ;THE BACK OF THE DIAL PAN IS 4 11/16 INCHES IN DIAMETER ;IT WOULD SINK INTO A CASE AN 1/8 OF AN INCH. GOOD FOR SETH THOMAS CLOCK WITH MOVEMENT 4 1/2, 89. THE GLASS IN PREFECT CONDITION. IF YOU NEED MORE INFO JUST LET ME KNOW.