I think size does make a huge difference. I know smaller people can beat people much bigger then them if they're skilled enough.. But size still is a big factor, at least in sparring. I don't know about actual fights though, since you can do "dirty" stuff and attack to the vital points, but even then i know size must be an advatange. anyway i've never actually been in a real fight. oh yea there are advantages to being big but there are advantages to being small. And I'm neither big or small.. but other then size there are other advantages too right? Like pain tolerance, that's an important one!