This is my first post... and this is my first FMA fanart! (Yes, I'm the nut who decided to make my first fanart life-sized O.O) I've heard so many guesses on Ed's height. This one measures in at about five foot-ish. It's done in acrylic paint on brown sketch/packing paper. It will eventually be made into a wallscroll and sold at Otakon.
So, here's Ed in all of his short glory, (Short for a person, huge for a fanart ^_^; )
And here's a close-up so you can see more of the detail,
...and, to prove it's size, here's me standing next to it, looking like a dork. Man, I feel tall. I think it's just the angle though. I'm actually very short myself....