Nostril stretching is a total bitch, to be honest. I'm at 6g right now, stretched from 14g over the course of 15 months. I'd say stretch them first to a size that you think is decent ,and see if you still like them on your face. I know people who have set larger goals, and once they met them, they didn't like the look and downsized. With a punch, you can't downsize. Keep that in mind.