Oakley Bottlecap glasses - great choice
The thing I LOVE about these, besides the fit, is that there is no frame on the bottom, to obstruct your vision while cycling or running. Also, since they are open at the bottom, they don't steam up on a hot, humid day. I'm not sure if I'll love them skiing because of this. I have a smaller face, and these aren't huge. I think they would fit a medium face size well too.