i was around 13 i'll say?
i never really got into the habit of always wearing them though, so i just let the holes close up. it's not like they were of any use, anyway.
No older than eight.
I had to get my left ear pierced a second time because the original hole closed up with a strand of hair entwined in it and it hurt like hell and was not working so on my left I have two holes, but my right ear is only pierced once.
True story.