iPhone Earbuds are too big and uncomfortable

I love my iPhone but the earbuds are too big to fit comfortably in my ears. When I work out or do any movement at all the buds fallout which defeats the purpose of listening to music on my iPhone. Does anyone know of any earbuds or headsets that I can buy that work better with the iPhone? I've googled the web and lots of people are having this same problem, but I have yet to find a solution.