John Minchillo / AP

Confidence plays a critical role in the success of a presidential candidate. You’re constantly thrust into situations in which you must think on your feet and address a large, diverse groups of people.

Research has shown that often a person’s height can affect their level of self-esteem, and how they are perceived. In fact, height can be taken as an index of a person’s leadership ability—we assume tall people are powerful. According to Science Direct, the tallest U.S. presidential candidate usually wins the popular vote, and “taller presidents stand a better chance of being re-elected.”

Based on height alone, which candidate has the best chance of using height to his or her advantage? InsideGov found the height of 19 of the 23* current presidential candidates and ordered them from shortest to tallest.

*Jill Stein, Jim Webb, John Kasich and Jim Gilmore have done a pretty good job of keeping their heights a mystery. If you know what they are (and provide a reputable source), let us know in the comments.

#19. Carly Fiorina

Party: Republican

Fiorina is 5 feet 6 inches.

#18. Lindsey Graham

Party: Republican

Graham is 5 feet 7 inches.

#17. Hillary Clinton

Party: Democrat

Clinton is 5 feet 7 inches.

#16. Rand Paul

Party: Republican

Paul is 5 feet 8 inches.

#15. Bobby Jindal

Party: Republican

Jindal is 5 feet 10 inches.

#14. Marco Rubio

Party: Republican

Rubio is 5 feet 10 inches.

#13. Lincoln Chafee

Party: Democrat

Chafee is 5 feet 10 inches.

#12. Mike Huckabee

Party: Republican

Huckabee is 5 feet 11 inches.

#11. Chris Christie

Party: Republican

Christie is 5 feet 11 inches.

#10. Ted Cruz

Party: Republican

Cruz is 5 feet 11 inches.

#9. Ben Carson

Party: Republican

Carson is 5 feet 11 inches.

#8. Bernie Sanders

Party: Democrat

Sanders is 6 feet tall.

#7. Rick Perry

Party: Republican

Perry is 6 feet 1 inch.

#6. Martin O’Malley

Party: Democrat

O’Malley is 6 feet 1 inch.

#5. Scott Walker

Party: Republican

Walker is 6 feet 1 inch.

#4. Donald Trump

Party: Republican

Trump is 6 feet 3 inches.

#3. Rick Santorum

Party: Republican

Santorum is 6 feet 3 inches.

#2. Jeb Bush

Party: Republican

Bush is 6 feet 3 inches.

#1. George Pataki

Party: Republican

Pataki is 6 feet 5 inches.