BAF jewelry measurement guide

In our drop-down menus for adding to cart (in order), we show the gauge of the item you are ordering, then the length/diameter, then the ball size if it has any:

Jewelry is measured through a gauge system (see chart to right).

The *higher* the gauge number the *smaller* the wire is.
A standard earring bought in the mall is usually 20 gauge.
A standard ear piercing at an actual shop with a needle is usually a 14 gauge.
To get larger gauge piercings you have to stretch your piercings.

Jewelry gauges/sizes can vary between manufacturers. There is no universal regulation on companies to make a standard size in body jewelry. A big part of this is that some jewelry is made overseas and measured in millimeters. And in the USA jewelry is measured in inches/gauges. So many times jewelry can be anywhere from .5mm to 1mm different.

Jewelry can vary between .5 and 1mm depending on the manufacturer
Gauge	Millimeter	Inch
16g	1.2mm	3/64"
14g	1.6mm	1/16"
12g	2mm	5/64"
10g	2.4mm	3/32"
8g	3.2mm	1/8"
6g	4mm	5/32"
4g	5mm	3/16"
2g	6mm	1/4"
0g	8mm	5/16"
00g	9.5mm	3/8"
000g	10mm
	11mm	7/16"
	13mm	1/2"
	14mm	9/16"
	16mm	5/8"
	19mm	3/4"
	22mm	7/8"
	25mm	1"
	26.9mm	1-1/16"
	28.5mm	1-1/8"
	30.1mm	1-3/16"
	31.7mm	1-1/4"
	33.3mm	1-5/16"
	34.9mm	1-3/8"
	36.5mm	1-7/16"
	38.1mm	1-1/2"
	39.6mm	1-9/16"
	41.2mm	1-5/8"
	44.4mm	1-3/4"
	47.6mm	1-7/8"
	51mm	2"

Enlarged example of 1" on ruler

What size captives will fit through eyelets
Gauge	TOTAL plug length	Internal diameter	What will fit?
8g	11mm	2mm	Nothing
6g	11mm	3.5mm	18g 5/8" or wider 16g 5/8" or wider 14g 5/8" or wider
4g	11mm	4mm	18g 1/2" or wider 16g 1/2" or wider 14g 1/2" or wider
2g	11mm	5mm	18g 1/2" or wider 16g 1/2" or wider 14g 1/2" or wider 12g 1/2" or wider 10g 5/8" or wider 8g 5/8" or wider
0g	11mm	11.7mm	18g 1/2" or wider 16g 1/2" or wider 14g 1/2" or wider 12g 1/2" or wider 10g 1/2" or wider 8g 1/2" or wider 6g 1/2" or wider
00g	11mm	13.7mm	18g 1/2" or wider 16g 1/2" or wider 14g 1/2" or wider 12g 1/2" or wider 10g 1/2" or wider 8g 1/2" or wider 6g 1/2" or wider 4g 1/2" or wider 2g 1/2" or wider

Here is image of the gauge card you'll receive with each order (back/front) below: