Columns.Width Property (Word)
Returns or sets the width of the specified columns, in points. Read/write Long.
Syntax
expression .Width
expression A variable that represents a Columns collection.
Example
This example creates a 5x5 table in a new document and then sets the width of all the columns in the table to 1.5 inches.
Dim objDoc As Document
Dim objTable As Table
Set objDoc = ActiveDocument
Set objTable = objDoc.Tables.Add(Range:=Selection.Range, _
NumRows:=5, NumColumns:=5)
objTable.Columns.Width = InchesToPoints(1.5)