I'm 199cm (I think that's about 6'4" in the old language) and I've always weighed 72-74kg from since I stopped growing. I haven't put on any weight since starting my job, although I do plenty of walking around during the day. I obviously have a good metabolism though cause it's almost impossible for me to put on weight no matter how much I eat. My grandfather has a video of me at his 70th birthday where I chowed through a piled plate of prawns (don't let me near prawns, I'll devour them, haha), four sausages, chicken legs, wings, random bits, etc, a piece of steak, whole heap of vegies, plate of chips and nuggets, bowl of ice cream, lollies, etc. Plus I had at least 4 or 5 glasses of coke. Mum used to make me two sets of dinners at one point. Both the same but two plates worth as I eat so much. I don't eat that much any more though, lol. So it does really depend on the person. I can go to Macca's and not put on any wait while one of my 'larger' mates will put on a kilo after eating Macca's.