As long as you're not having any pain or resistance I'd say it's okay. My lobes are a lot stretchier now that they're bigger... I just went to 12mm (little smaller than 1/2") probably four weeks ago and I'm already able to put in double flare 12mm plugs and single-flare 13mm. I'm not sure how many wraps of tape it would take, though.
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!