Mo Willems, #1 New York Times bestselling, award-winning author-illustrator, zooms in on the smallest things in the universe to explore one of life's most elemental questions in this nonfiction picture book about the relationship between size and scale. Are YOU small?

A little question sends readers on a BIG adventure to see the smallest of the small. From an average-size kid . . . to a cookie crumb . . . to a water molecule . . . all the way down to a single quark, readers discover that size is a matter of perspective.

The perfect companion title to Mo Willems' breakout title, Are You Big?, this early-learning concept book features bold text, expressive art, and real-world science.