Body Jewelry Gauge Size Guide: Understanding Gauges, Millimeters & Sizing

Shopping for new body jewelry should be fun—not a guessing game.

But if you've ever seen sizes like 20G, 18G, 16G, 14G, or 12G and wondered what they actually mean, you're definitely not alone.

Understanding body jewelry gauge sizes makes it much easier to find jewelry that fits your piercing correctly. Here's a simple guide to help you get started.

What Does Gauge Mean in Body Jewelry?

The gauge (G) refers to the thickness of the part of the jewelry that passes through your piercing.

Here's the part that can be confusing:

The smaller the gauge number, the thicker the jewelry.

That means a 14G barbell is thicker than a 16G barbell, while an 18G piece is thinner than both.

Some common gauge measurements include:

• 20G — 0.8 mm

• 18G — 1.0 mm

• 16G — 1.2 mm

• 14G — 1.6 mm

• 12G — 2.0 mm

• 10G — 2.5 mm

• 8G — 3.2 mm

• 6G — 4.0 mm

• 4G — 5.0 mm

• 2G — 6.0 mm

• 0G — 8.0 mm

• 00G — approximately 10 mm

Once you get beyond 00G, stretched jewelry is commonly listed primarily in millimeters or inches.

What Gauge Is My Piercing?

There are common sizes associated with different piercings, but there's no guarantee that your piercing uses one of them.

Your piercer may have selected a particular size based on your anatomy, placement, jewelry, or other factors.

For example, you may commonly encounter 16G or 14G jewelry when shopping for cartilage, septum, eyebrow, lip, tongue, nipple, or navel jewelry, depending on the piercing.

Nostril jewelry is often available in thinner gauges such as 18G or 20G.

These are general examples—not rules.

The safest option is to know the size of the jewelry you're currently wearing or ask a professional piercer to measure it.

Gauge Isn't the Only Measurement That Matters

Finding the correct gauge is only part of choosing body jewelry.

You may also need to know the jewelry's length or diameter.

For a straight or curved barbell, you'll typically need to consider the wearable length of the bar.

For hoops, circular barbells, and similar jewelry, diameter can determine how closely the jewelry sits against your body.

Two pieces can both be 16G but fit completely differently because they have different lengths or diameters.

What Happens If You Buy the Wrong Gauge?

If jewelry is too thick for your piercing, don't force it through.

Forcing oversized jewelry can cause pain, irritation, or damage to the piercing.

Jewelry that's significantly thinner than your established piercing may also change how the piercing fits over time.

When you're uncertain, get your piercing measured before ordering.

A few minutes spent checking your size can save you from buying jewelry you can't comfortably wear.

What About Plugs and Tunnels?

Sizing becomes especially important when you're shopping for stretched-ear jewelry.

Plugs and tunnels are available across a much wider range of sizes, from smaller gauges all the way to large millimeter measurements.

If you're stretching your ears, don't simply skip to a dramatically larger size because you like a particular piece of jewelry.

Stretching should be gradual.

Give your ears adequate time between sizes and get guidance from an experienced professional piercer if you're unsure about safely increasing your size.

Write Down Your Jewelry Sizes

Here's an easy trick if you have several piercings:

Keep a note on your phone with the size of every piercing.

For example:

Nostril — Gauge / Diameter
Septum — Gauge / Diameter
Helix — Gauge / Diameter
Industrial — Gauge / Length
Navel — Gauge / Length
Plugs — Current Size

The next time you find jewelry you love, you'll already know which size to order.

Find Your Size. Find Your Style.

Understanding body jewelry sizing gives you a lot more freedom when shopping.

Once you know your gauge, length, and diameter, you can spend less time wondering whether something will fit and more time finding jewelry that actually matches your style.

At Kruelty, we're building a collection of body jewelry ranging from everyday essentials to pieces designed to stand out.

Know your size.

Choose your jewelry.

Stay different. Stay Kruel.