According to Xenopedia seeing as I don't have a source book readily available;
Big chap: 7 ft 2 (Google corresponds the height with Bolaji Badejo)
Alien Warrior: 7 ft 10 *the article notes this is generalized and nears as I understand nobody in the Alien suits for Aliens was 7 feet tall. Later Warriors are shown to be as tall as various Predators when standing upright, so one would assume they are at least 7 feet.
The dragon: N/A
I would assume the runner is roughly the same height as the Big Chap. It's also played by Tom Woodruff Jr so I'd imagine that his height could be used as a baseline. Woodruff's height according to Google is at 6 foot 2 inches. So naturally when standing up the Alien should be as tall as he is and then some given the size of the Alien head giving a bit more height.
Given what we see of other Xenomorphs being somewhere around 7 feet tall I would presume that the Runner's height is somewhere between Woodruff's own and Big Chap at the very smallest.
Given how thin Bolaji Badejo was, I would presume the Big Chap is the thinnest of them and probably the largest person to portray them. Woodruff looks to be about as bulky as the people portraying the Warriors. Though I'm hard-pressed to say anything on it considering I just don't have hard numbers for it and in-universe it can vary given age, host, and type (Resurrection warriors would naturally be different to Aliens). There's also the issue of Alien 3 using multiple performers to portray the Runner so it's size and bulk can vary per shot. I mention Woodruff specifically since we know his height and while he isn't as tall as Badejo, he's still close enough for editing to make him taller and he was actually in the suit.
