Alec Brown of the GB Phoenix carries a program listing of 7’1”.  Now, being 5’10”ish, I don’t have a real good feeling for heights above 6 1/2 feet.  I mean, if I’m looking up at a guy, and I usually am, I tend to default to 6’2” for reference purposes.  I would suck as a carnival height/weight guesser dude.   

Anyway, you make the call.  First-hand, Alec Brown might just be 17 feet tall: