I looked for a few moments, because something seemed off, and I believe it's the lack of a bridge to their nose that was throwing me off. Also, the eyes look about the same size. The left and middle girl are both in 3/4 profile views, so a bit of foreshortening is required to properly show off the eyes. The girl on the right, her eyes just look a bit crooked, dunno how exactly to explain it.
Onto the shapes of their faces, I'd say they're pretty nice, no real complaints. They do seem a bit... er, big, and I'd say it's because their faces are a bit... small. What I mean by this is that it seems that their faces don't take up the proper amount of space on their head. It may just be a part of your style, though.
And I just gotta say it, but this is some of the cleanest, most beautiful lineart I've seen. Seriously, complete and total props bro.