When making 3D objects, what are the sizes for all the body parts?

And how to get .obj files for every single piece.

This may be simple, I'm thinking they are all at around the whole .2 concept of size.

Just need an answer from someone that knows.

So I don't get things I've looked into. I already checked these links and found some help:
Google.com of course.
http://forum.toribash.com/showthread.php?t=195093
http://forum.toribash.com/showthread.php?t=492531