In a straight stack, one trillion US $1 bills would be a stack 67,866 miles high (109220 km). The minimum thickness of a bundle of 50 new US $1 bills is 0.215 inches (0.5 cm), not counting the band....
Trick question. Numbers are written horizontally, so the size of the number doesn't affect it's height (line-wrapping aside). It will always be the height of your font.