I've got a smaller face but like Aviators. Since I didn't want to look like a dragonfly when I wore them, I went with the 52mm. They fit very well and are comfortable on my face. I had to put the earpieces in hot water and bend them slightly for a perfect fit, but that was it. Lenses are nice and dark, and do a good job of cutting down on glare without distorting my peripherals. The only con is that these glasses are HEAVY! They're made of real metal, so they weigh more than the Oakleys I wear under my motorcycle helmet. Fine for trips around town, to the store, etc, but on longer drives I have to adjust them every so often because my nose gets sore where the pads rest. Not sore so much as irritated, I guess.
Other than that, great glasses!