Body Jewelry comes in different sizes. You will see some jewelry displayed by their gauge size and some by their mm size. Below is a sizing chart to help size your jewelry.

Gauge	Millimeters(mm)	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 mm	1/2"
	14 mm	9/16"
	16 mm	5/8"
	19 mm	3/4"
	22 mm	7/8"
	25 mm	1"
	29 mm	1 1/8"
	32 mm	1 1/4"
	35 mm	1 3/8"
	38 mm	1 1/2"
	41 mm	1 5/8"
	44 mm	1 3/4"
	48 mm	1 7/8"
	51 mm	2"

Belts

Small: 30 - 32
Medium: 34 - 36
Large: 38 - 40
X-Large: 42 - 44