True if the specified field's column width is set automatically when the field is used on the row axis or the column axis. To set the width of a field's column, set the property to False. Then, set the GroupedWidth property of the field to the desired width. The default value is True. Read/write Boolean.
expression.GroupedAutoFit
expression Required. An expression that returns a PivotField object.
Example
This example disables the GroupedAutoFit property of the "ProductName" field in PivotTable1 and then sets the width of the field to 150 pixels.
Sub Set_ColumnWidth()
Dim fldProducts
' Set a variable to the ProductName field.
Set fldProducts = PivotTable1.ActiveView.FieldSets("ProductName").Fields(0)
' Set the GroupedAutoFit for the ProductName field.
fldProducts.GroupedAutoFit = False
' Set the width of the ProductName field to 150 pixels.
fldProducts.GroupedWidth = 150
End Sub