There were 6 million Jews killed in the Holocaust.
U.S. Cellular Field can hold 40,615 people. 6 million people would fill it 147 times.
Naperville, one of the largest cities in Illinois, has a population of 142,773. 6 million people would be about 42 Napervilles.
University of Illinois at Urbana-Champaign is one of the largest colleges in Illinois and graduates an average of 6,419 students per year. It would take 935 years for this school to graduate 6 million students.
Willis Tower is one of the tallest buildings in Illinois (110 floors). A stack of 6 million pennies would be as tall as 21 Willis Towers.
6 million people holding hands would stretch from New York to Los Angeles and back with more than 700,000 people left over.
Comparing to data near Naperville, Illinois. (click to change)