Pele, Maradona, Messi, etc. etc. etc.
Marta, Mia, Sun Wen, Homare Sawa, etc. etc.
Of course there are exceptions with size that are/were great. But, for the most part, not a prerequisite.
Seems that American coaches are insistent on trying to make it a prerequisite. Thinking size will win out. I'll take a team full of short, speedy, highly skilled athletes over BIG, strong and fast all day long.
A close friend of mine, former pro, tells a story of playing on a US National team VS an Asian team and getting thier asses handed to them. He said his team was loaded with 6 footers and they were all 5'4 or 5'5, but fast as hell, as well as highly skilled.