O_O
Sorry, but it is funny.
I thought you knew, since you do great render.
Anyway, basically the fisrt bone you put starts big, but you could reduce the size with the size tool, and very bone that follows the fisrt bone one will stay the same size.
For you situation,
1:you could star all over
. Just lets hope you didn't do any constraints.
2: If you did do contraints, you could still resize each individual bone, but you could still do it with out constraints.
Good luck
