How tall do you think i will be by age... 21?

[Lovely]

Ok, i am 15 right now and i am 5"4 and a half.
My father is 6'2
My mother is 5"4
I used to be around 5"1 or 5"2 when i was 11/12
What height do you think i will reach around age 21?

 

[crayonsareforeating]

7 feet 3 inches