The choice of paper size depends on the plotter or device configured for output. Each plotter or device has a standard list of available output sizes. The output size for a layout is assigned can be quired with the CanonicalMediaName property.

You can also query the units for a layout using the PlotPaperUnits property. This property returns one of three values defined by the PlotPaperUnit enum: Inches, Millimeters, or Pixels. If your plotter is configured for raster output, the output size is returned in pixels.