PageWidth Element (RDL)
Specifies the default width of a report that is rendered in a physical page-oriented rendering extension.
The string for PageWidth must contain a number (with a period character used as an optional decimal separator). The number must be followed by a designator for a CSS length unit such as cm, mm, in, pt, or pc. A space between the number and the designator is optional. For more information about size designators, see msdn.microsoft.com.
The maximum size for PageWidth is 160 inches. The minimum size must be greater than 0 inches.