I see this become apparent on social media every so often and it's really just depressing how widespread the misunderstanding is.
51% of Americans who were polled in a 2021 survey agreed with the statement that "You pay your marginal tax rate on all of your income".
Maybe if we put it in terms of football fields or empire state buildings or number of burgers...
"The difference between the length of a football and a football field" gets us in the ballpark, but it understates it by about a factor of 3; a football is ~1 foot, and a football field is 300 feet (360 with the endzones).
Or 9/11s