Fun fact: If a 9-ft person’s palm (4 in wide) were scaled to match the circumference of the observable universe, that person would be ≈ 7.9 trillion light-years tall (≈ 7.46×10²⁵ km), i.e. ~2.72×10²⁸ times taller than 9 ft.
Why do I know this? Well, I dunno.