With the Imposition functionality in callas pdfToolbox, which is very powerful and flexible, you can create a sheet with different sizes of pages.
For example A5 card and business cards on the same sheet.
How to impose multiple page sizes correctly in Switch?
Re: How to impose multiple page sizes correctly in Switch?
There is no module for Switch that goes by the name "Switch Imposition Module". There are multiple ways of imposing files using Switch, so please be more specific about the functionality that you are using.