This is the "sturdy" wire I use when making wings. Typically, I just use one piece of this one, but it is the "backbone" of the wing, so to speak. I also use it to poke a hole in my doll's back before I bake it. Then this is the wire that will go into her back when I add the completed wings later. This one spool will last you through many, many sets of wings!
One roll of 15 yards 20 gauge gold-colored brass wire.