Just echoing the others: No way for us to know and attached lobes won't in itself be a problem. I'm another who has attached lobes and am at 9/16". Attached lobes haven't been at all a factor for me in anything other than the way they appear stretched -which I like. It's going to be much more about your flesh's elasticity, healing ability, etc. and how careful you are in stretching them. My skin, all over, is quite "snug" in that it doesn't have a lot of stretch to it so I've needed to stretch very slow and then for extra care I wait a few extra months between stretches beyond when they show they are ready to stretch again.
Take all the best care, listen to your body, and who knows where you'll end up? It's different for everyone.
9/16" lobes, 3 X 14G L lobe, 14G industrial L lobe, 16G eyebrow, 2 X nostril (each side), 16G septum, 14G tongue, 2 X 14G labret (vertically stacked), 2 X 14G nipples, 14G navel, 16G L labium minorum, 2 X microdermals, optional foot reconstruction (both cosmetic and functional)
Piercing and scalpeling artist, pro & lifestyle domina