I'm looking a set of Dark Brown glass eyes for my Leia ANH bust,I keep seeing full round eyes and oval - paperweight eyes. The ones I got for my Chewie15's Indy I think were 28mm- Iris 12 is 28mm the standerd for the human eye, Whats better full or half round eyes ?
Regarding full or oval , I don't suppose it matters as you are only going to see so much of the eye anyway, but make sure that the eye shape of the bust can lend itself to the oval shape.