eeevanillaSeriously, just work out and eat properly, it does wonders.but im not gonna be big enough
like even people at the limit of natural fitness look fairly small
I think you underestimate what working out and eating properly can accomplish. Not every beefcake out there is poppin' roids.
But if all you want to do is be bigger, then you need to start by cultivating a tremendous amount of mass.
From what it sounds like, this is the look you're going for.
http://1.bp.blogspot.com/-Dqh3pF9-LJo/UimQFUBoFwI/AAAAAAACITs/6l46nK7TO1M/s1600/HeJSi.gif