Body jewelry gauge is a measurement of the thickness of the jewelry. It is measured from 20 to 00 gauges. A 20 gauge piece of jewelry will be the smallest available, while a piece that is 00 gauge will be the largest available.
If someone’s ear were pierced at a standard size, stretching the ear lobe is an option if a higher gauge piece of jewelry were desired. Stretching should be gradual thing and should be done by going from one size gauge to the next. Trying to stretch the skin too far too fast, could result in scarring. The most common size gauge that is used in your ear is 20 or 18. In the eyebrow it will either be 18ga or 16ga, but 16ga is the most commonly used size. The labret piercing is either 14ga or 12ga, but that will all depend on how thick the lip is. The belly is 14. The most common size gauge used in the tongue as well as the nipple is either 14ga or 12ga. The nostril is 20ga.