Prob depends on your actual skin and whether the scar tissue is thick where you have stretched it. I had a 6mm in my second hole and i took it out after a panic and it has shrunk down.
I also put a 10mm in my right lobe then panicked, decided to take it out, bled all over my bathroom, cos it had split, and then put a 6mm back in, whichseems to be staying in okay.
It really depends on your own body.
I seem to panic quite a lot lately.
