How long do you think my will be?

Well first of all, don't just say "its how you use it not the size" just answer please. So im 14 and right now its 6 inches, I have the hair down there, my voice has lowered but I havent started shaving yet and don't have much armpit hair yet. So just out of curiousity, how long do you think my will be by the time im completely done with puberty?