So I'm over here in Ireland, and they go by millimeters rather than the gauges I'm used to... easy enough to look up on the conversion chart that I'm at 2mm/12g. I went to a local shop today to get the next size up (I've been at 12g for about 4 months... I would have ordered from BAF of course but I wanted it immediately!). They told me it was 4mm, and were quite certain there was nothing in between 2mm and 4mm. I asked them a few times if they were sure, I thought the next was like 2.6, maybe 3 mm.
Anyhow... I let this guy who has "been piercing for 15 yrs" taper my 12g to 4 mm, and it really didn't feel right, I thought maybe I skipped one step. Then I got home and found out that 4mm is a 6 gauge!!!!! Well, I think I could have left it in and it would have healed eventually, but I took em out and put the 12g back in! There was a small amount of bleeding but nothing major, by some miracle I don't think I even have a blowout.
I learned my lesson today
I should have just told them I thought they were wrong and left!