SIZING:
Picking the right size for the right person is very important and is something that can only be learned after years of experience. The two things that define size are:
GAUGE:
Gauge is the thickness of the jewelry which is based on the American Standard Wire Gauge. It starts at 36g and goes to 0g. The larger the number the thinner the wire will be. When choosing a gauge to be pierced at the piercer must decide which is thick enough to reduce migration and tearing but thin enough to not add too much weight. There is a standard which I have listed and average widths. Also a gauge to mm/inch conversion chart.
| Gauge | Metric | Inches |
| 20g | 0.82mm | 0.032 of an inch |
| 18g | 1.024mm | 0.040 of an inch |
| 16g | 1.33mm | 0.051 of an inch |
| 14g | 1.63mm | 0.064 of an inch |
| 12g | 2.06mm | 0.081 of an inch |
| 10g | 2.60mm | 0.102 of an inch |
| 8g | 3.25mm | 0.128 of an inch |
| 6g | 4.12mm | 0.162 of an inch |
| 4g | 5.18mm | 0.204 of an inch |
| 2g | 6.53mm | 0.257 of an inch |
| 0g | 8.26mm | 0.325 of an inch |
| 00g | 9.55mm | 0.365(3/8) of an inch |
| 000g | 11.11mm | 0.437(7/16) of an inch |
| 0000g | 12.71mm | 0.51(1/2) of an inch |
WIDTH:
Width is the inner width between the inside of the jewelry. A good rule of thumb is that an 1/8 of an inch is add to the amount of tissue between the two piercing holes. Once again this is a decision that needs to be made by the piercer but there is a list of standard sizes above.
Correct width sizing can reduce migration, the piercing becoming affected and/or scaring. Incorrect width is the most common problem I see. Many of us were taught to always do this piercing at that size and not to decide on based on the size and shape of the piercing area.
| Piercing: | Gauge: | Width: |
| EAR: | 18g - 8g | 5/16 - 3/4 |
| EAR CARTILAGE | 18g - 10g | 3/8 - 1/2 |
| NOSTRIL | 18g to 12g | 3/8 - 1/2 |
| EYEBROW | 18g to 14g | 3/8 - 7/16 |
| SEPTUM | 14g to 10g | 3/8 - 1/2 |
| LIP | 16g to 10g | 3/8 - 7/16 |
| LABRET | 14g to 10g | Fishtail or 3/8 - 1/2 |
| CHEEK/BEAUTY MARK | 14g to 10g | 3/8 - 1/2 |
| TONGUE | 14g to 10g | 5/8 - 7/8 |
| NIPPLE | 14g to 10g | 5/8 - 7/8 |
| NAVEL | 14g to 10g | 7/16 - 1/2 |
| CLITORAL HOOD | 14g to 10g | 3/8 - 1/2 |
| LABIA MINORA(inner) | 12g to 10g | 7/16 - 1/2 |
| LABIA MAJORA(outter) | 12g to 10g | 5/8 - 3/4 |
| PRINCE ALBERT | 12g to 10g | 5/8 - 7/8 |
| FRENUM | 12g to 10g | 7/16 - 5/8 |
| HAFADA/SCROTUM | 12g to 10g | 3/8 - 1/2 |
| GUICHE | 12g to 10g | 9/16 - 7/8 |
| PUBIC | 12g to 10g | 3/8 - 1/2 |