i like to reuse as much scrap paper as i can at the office. ill take all my old 8.5 x 11 (standard a size) paper and cut it in half or in quarters to use as simple note/scratch paper.

half is for 8.5 x 5.5 inch pieces
quarter is for 4.25 x 5.5 inch pieces

print with the bottom on build plate. no supports, nothing fancy. as many walls as you want. layer height doesnt matter. infill doesnt matter.