This metal clock dial has an aluminum base and is 1/32" thick with a 3/8" center hole. This dial has a 4 1/2" outside diameter and a 4 3/16" time ring diameter. The numerals are black on an ivory background. Note: The dial may have a removable plastic coating which protects the surface during shipping, be sure to remove this before your project is complete. We recommend using Black 1 7/8" Spade
clock hands with this dial.