Your 4' 2"? Hmm... That is sorta short. But of course you haven't went through puberty yet! [That's strange though, I was 4' 11" when I was 9!] Aww... well, last year the 10 year olds were 4' 9" last year! I've always been tall. I'm about, 3-4 inches taller than most my age.