You can use A3, 11 × 17 originals or printing paper. However, use the reduce mode to ensure that the entire image is printed. This is because the maximum print areas are as follows:
(mainly Europe and Asia): 290 × 410 mm (11.4 × 16.1 inches)
(mainly North America): 290 × 420 mm (11.4 × 16.5 inches)