I've got two 16mm's and two 3mm's at the mo. I pierced them myself, started at 1.6, then 4,5,6,8,10,12,14,16. First stretch did hurt a lot, but this had something to do with I only pierced them 2 weeks earlier, and it was a big stretch. If you have the money, what I'd recommend is that you get pierced with a large guage needle, say 2mm or 2.5 or however big your piercer is comfortable with, then have them stretch immediately to the next size. This not only means you start on 4mm or something, but it will actually heal quicker too.