well I have a 6g in my tounge and started with a 14g, it was pretty easy for me to go up to a 6g, I wouldnt try to go from a 14g to a 4g at once that would really hurt, but you can go to a tattoo/piercing shop and get them to gauge up if you want Im not sure the charge of it, But I did mine slowly, and if you use your teethto pull and push the ring back and forth the hole will stretch pretty good.