earrings

• 1 = Helix
• 2 = Industrial
• 3 = Rook
• 4 = Daith
• 5 = Tragus
• 6 = Snug
• 7 = Conch
• 8 = Anti-Tragus
• 9 = Lobe

from: wikipedia.org

Gauges and other measuring systems

Body jewelry is measured in gauges from 24g to ...

00g; sizes larger than that are measured in fractions of inches starting at 7/16" and increasing by 1/16" increments. In Europe and Australia they are measured in millimeters.
The table below uses rounding; conversions are not precise.

	Gauge	Millimeters	Inches
	18g	1.0 mm	5/128"
	16g	1.2 mm	3/64"
	14g	1.6 mm	1/16"
	12g	2 mm	5/64"
	10g	2.4 mm	3/32"
	8g	3.2 mm	1/8"
	6g	4 mm	5/32"
	4g	5 mm	3/16"
	2g	6 mm	1/4"
	0g	8 mm	1/3"
	00g	10 mm	3/8"
		11 mm	7/16"
		12.7 mm	1/2"
		14 mm	9/16"
		16 mm	5/8"
		19 mm	3/4"
		22 mm	7/8"
		25 mm	1"