What Does Gauge Mean?
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Gauge (G) is a measurement of thickness.
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The higher the gauge number, the thinner the jewelry.
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The lower the gauge number, the thicker the jewelry.
For example, a 20G earring is thinner than a 14G barbell.
Gauge to Millimeter Conversion Chart
Here’s a quick reference table you can use when choosing piercing jewelry:
| Gauge (G) | Millimeters (mm) | Common Uses |
|---|---|---|
| 20G | 0.8 mm | Standard ear studs, nose piercings |
| 18G | 1.0 mm | Nose rings, cartilage piercings |
| 16G | 1.2 mm | Lip, eyebrow, some cartilage |
| 14G | 1.6 mm | Navel, tongue, industrial, some cartilage |
| 12G | 2.0 mm | Stretched piercings, larger barbells |
| 10G | 2.5 mm | Stretching jewelry |
| 8G | 3.0 mm | Early-stage stretching |
| 6G | 4.0 mm | Larger gauge stretching |
| 4G | 5.0 mm | Heavy stretching |
| 2G | 6.0 mm | Advanced stretching |
| 0G | 8.0 mm | Large gauge plugs/tunnels |
| 00G | 10.0 mm |
Very large plugs/tunnels |
How to Choose the Right Size
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For new piercings: Start with the size recommended by your piercer (usually 20G, 18G, or 16G).
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For stretching: Always go slowly—move one size at a time to avoid damage.
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For healed piercings: You may switch to slightly thicker jewelry if you want a stronger, more durable fit.
Final Thoughts
Understanding gauge vs. millimeter sizing makes buying piercing jewelry much easier. Whether you’re getting your first piercing or planning to stretch your lobes, knowing the conversion will help you choose the right piece every time.
👉 At TIV, all our titanium jewelry is clearly labeled in both gauge and millimeters, so you can shop with confidence and find your perfect fit.
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