Medically reviewed by Wendy L. Hunter, M.D. A baby's size at birth doesn't reliably predict their height as an adult. Genetics has the biggest influence on a child's future height. Factors like ...

How big are most toddlers? How tall should a 10-year-old be? Read on to learn more about average heights—and how to predict your kiddo's adult size. Medically reviewed by Wendy L. Hunter, M.D. It can ...