You could go as big as you want! I'm positive you wouldn't have problems reaching 00G.
I'm Lindsay.
I have 1/2" lobes and 11 piercings: left helix x2, both conches, both nostrils, septum, navel, and VCH. My lobes are small but I know a lot about stretching and how to do it safely, so message me if you have any questions!