Signature pic question...

I was wondering if there's a program where I could shrink a pic to post on my sig. or the pic under my user name on the posts, avatar I think it's called. I took it at the lowest size possible on my camera and, it's still huge (about 1/2 page at least).

Photoshop, MS paint, photobucket (save it, shrink it, copy it). You dont have to host your sig pic on AF if thats a problem.