ⓘ Body jewelry sizes. Items of body piercing jewelry have an important common factor: the diameter of the part of the item of jewelry where it will rest in the pi ..


ⓘ Body jewelry sizes

Items of body piercing jewelry have an important common factor: the diameter of the part of the item of jewelry where it will rest in the piercing site. With the wearing of European-traditional kinds of earrings, that thickness is not an issue, because jewelry is made to use only thin wire for support, and the wearer need only have a narrow piercing hole to accommodate it. But with body jewelry, there is a wide variety of possible sizes, and wearers generally want jewelry that is the same size as their piercing site. Some wearers want increasingly larger sizes to deliberately stretch the hole. So that wearers can choose the size they want, there are standards for body jewelry sizes, used by jewelry makers and sellers.

Generally, the system of gauge-and-inches is used: In gauge notation, jewelry less than ​ 1 ⁄ 2 ″ thick is typically measured in a system originally devised for measuring wire thickness. A gauge number denotes a thickness on a standardized scale which, for most purposes, starts at 20g 0.812 mm thick - often used for the posts for nose studs, and increases in thickness as the gauge number decreases to 0g, then 00g, and rarely goes any further as these thicknesses come closer and closer to ​ 1 ⁄ 2 ″. From there, sizes of ​ 1 ⁄ 2 ″ and thicker are always specified in fractions of an inch. But note that sizes thinner than ​ 1 ⁄ 2 ″ are also sometimes specified as fractions of an inch; see the Conversion Table to see how these interleave with gauges.

Even though the gauge system was originally meant for wire, it is now used regardless of whether an item of body jewelry is an actual wire, or is instead a wooden plug, a plastic ring, or any other material.

The alternative to using the gauge-and-inches system is to specify the thickness in millimeters.


1. Conversion table

Piercing sizes 18 gauge = 0.04 inches larger than 1/32-inch, 1.0 millimeters ear, nose piercings 14 gauge = 1/16-inch, 1.6 millimeters 8 gauge = 1/8-inch, 3.0 millimeters 2 gauge = 1/4-inch, 6.5 millimeters 0 gauge = 5/16-inch, 8.3 millimeters 00 gauge = 3/8-inch, 9.3 millimeters

The following table uses data from the "AWG wire sizes" table in the "American Wire Gauge" entry. Click "Show" to display.


2. Usage of the systems

Some jewelry makers or sellers who express the size of their jewelry in millimeters, may also list the nearest approximate gauge-and-inches measurements for each item. Using millimeters as the primary notation is most common in Europe and Australia.


3. Standard sizes of body piercings by location

These are the standard sizes that piercers usually use within the UK to pierce specific locations, and are not totally accurate.

The Piercing People Standard Size Guide


4. Units and notation

Discussions of gauge in this article use the American Wire Gauge AWG scale. Some jewelry may still use the obsolete and significantly different Standard Wire Gauge SWG scale instead. Both AWG and SWG express sizes as a gauge, but the numbers are different. For example, AWG 12g is 2.1 mm, but SWG 12g is 2.6 mm. AWG 8g happens to be the same as SWG 10g. AWG 000g is 10.4 mm, but SWG 000g is 9.4 mm.

In most discussions of body jewelry, sizes are specified by giving the gauge, usually abbreviated by the suffix "g", the same symbol as used for grams: "12g". The article American Wire Gauge system, section "Nomenclature and abbreviations in electrical distribution" shows other notations for gauge, but most are rarely used for expressing body jewelry sizes, except "ga." as in "12 ga.", which is used occasionally.

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