How Tall Will My 2 Year Old Be?
How Tall Will My 2 Year Old Be? How tall is the average 2-year-old? Average height for a 24-month-old is 33.5 inches for girls and 34.2 inches for boys. At the 2-year checkup, the pediatrician will weigh and measure her, and make sure her growth is following a healthy upward curve on the growth chart.