Artboards and slices in Sketch can even be printed. Choose File › Print in the menu, and you’ll view a list of your Artboards. If you don’t have any defined, then you will be able to print a slice instead.
Clicking on one of these will reveal the system’s print dialog, where you can configure the print settings.
Note: We have Artboard presets for A4, A5, and A6 paper sizes.