PageSetup.PageHeight property (Word)
Returns or sets the height of the page in points. Read/write Single .
expression An expression that returns a 'PageSetup' object.
Setting the PageHeight property changes the PaperSize property to wdPaperCustom . Use the PaperSize property to set the page height and width to those of a predefined paper size, such as Letter or A4.
This example sets the page height for the active document to 9 inches.
With ActiveDocument.PageSetup .PageHeight = InchesToPoints(9) .PageWidth = InchesToPoints(7) End With