Aditya Aditya commented 12/21/2016 How Tall Should A 13 Year Old Boy Be? I just turned 13 and I am 5' 5". My dad is 5' 8" and my mom is 5' 0". Im on the pretty tall side in my school. So don't let ur parents heights scare u or give u expectations... My friend is 4' 11" and his dad is 6'5"