Never tried the small jigs but Stumphunter(SC Member) ties some micro jigs for fly fishing and I have a few to try. No reason they would not work as light as they are. Just remember that the line is what casts the lure in fly fishing and too much weight on the fly will cause problems getting the line too lay out and cast well. How much is too much?? Just have to experiment and see what works. The size of the leader and tippet will affect this also.