3/4" is standard for around here in Ohio. it's easier to handle in the mouth. it normally goes 3/4" for initial piercing then down to 5/8" which that size is standard for all tongue rings in stores lol I'm working on getting my license. I've been doing piercings for awhile now. well before actually trying to get a license!! lol. I'm opening up my own shop with some friends after I get licensed.