Setting the page size in arcpy.mapping (for ArcMap layouts) will not be implemented. It is implemented as part of arcpy.mp in ArcGIS Pro. The Layout Object has a pageUnits, pageHeight, and pageWidth properties.
https://pro.arcgis.com/en/pro-app/latest/arcpy/mapping/layout-class.htm
Jeff - Layout and arcpy.mp teams
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.