Application.StandardFontSize Property (Excel)
Returns or sets the standard font size, in points. Read/write Long.
Syntax
expression .StandardFontSize
expression A variable that represents an Application object.
Remarks
If you change the standard font size by using this property, the change doesn't take effect until you restart Microsoft Excel.
Example
This example sets the standard font size to 12 points.
Application.StandardFontSize = 12