Ring: width inside
This is called the inner diameter. Measure straight across the space inside a ring that fits. Do not count the metal. For an oval ring, check the inside height and width too.
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Close-up pictures show examples of where jewellery can sit. They do not show the exact item you will buy. Your fit may look different.
Not sure which size to buy? Start with jewellery that fits you well. This guide shows you what to measure.
There is no one size for everyone. Your body and the place of your piercing affect the fit. A piercer is a person trained to fit piercing jewellery. Ask one if you are not sure.
Use a ruler marked in millimetres (mm). Use the size your piercer gave you, if you know it.
This is called the inner diameter. Measure straight across the space inside a ring that fits. Do not count the metal. For an oval ring, check the inside height and width too.
Measure the part between the top and the back or ball. Do not count the ends or screw threads. This is the part that sits in the piercing.
Measure the straight gap between the inside faces of the ends. Do not measure along the bend. Do not count the balls or gems.
This is how thick the bar or ring is. It is not its length or inside width. Match the thickness you already wear.
| Gauge | Thickness |
|---|---|
| 20g | About 0.8mm |
| 18g | About 1.0mm |
| 16g | About 1.2mm |
| 14g | About 1.6mm |
These numbers explain size names. They do not tell you which one fits your body. Do not force a thicker bar into a hole.
This can help with a hoop that goes around the edge of an ear or nostril. It is only a rough check. It does not tell you the exact ring size.
Do not put a ruler into the hole. Do not take out healing jewellery to measure it. This edge check is not for studs, bars, septum, daith or other inner-ear piercings. Never measure a picture on your screen.
Purple marks show the area. These are simple pictures. The exact spot can vary.

Choose your ear piercing below. A stud needs the right bar length. A ring needs the right width inside it.

This is the small bump above the ear lobe. Check the bar length or the width inside a ring that fits. Ask a piercer to check the size.
Shop anti-tragus jewellery
This is the bowl in the middle of your ear. For a stud, check the bar length. For a hoop, check the width inside a ring that fits. The hole-to-edge picture is only a rough guide.
Shop conch jewellery
This is the small fold just above the ear hole. Check the width inside the ring. The ring must have room around the fold. Do not measure to the outside edge of your ear.
Shop daith jewellery
This is the rim near the top of your ear. For a stud, check the bar length. For a hoop, check the width inside the ring. A hole-to-edge check is only a rough guide.
Shop helix jewellery
One long bar joins two holes in the ear. Check the bar between its two ends. Both holes must line up with the bar. Ask a piercer to check the fit.
Shop industrial jewellery
One ring joins two holes. It must fit both holes at once. Ask a piercer to check the ring size. The picture shows one example.
Shop orbital jewellery
This is the soft part at the bottom of your ear. For a stud, check the bar length. For a hoop, check the width inside the ring.
Shop lobe jewellery
This is the fold near the top of the inner ear. Check the length of a curved bar that fits. If you want a ring, ask a piercer to check the size.
Shop rook jewellery
This is the small flap in front of your ear hole. For a stud, check the bar length and the size of the top. A ring needs a separate size check.
Shop tragus jewellery
This goes through the ridge inside the ear rim. Check the bar length. This part of the ear can vary a lot. Ask a piercer to check the fit.
Shop snug (anti-helix) jewellery
Check the straight gap between the ends of a curved bar. Do not measure along the bend. Do not count the balls at the ends.
For a curved belly bar, check the bar length. Do not count the gems, balls or hanging parts. For a belly clicker, check its inside height and width too.

Choose your nose piercing below. A nose stud, nose ring and bridge bar need different size checks.

This sits across the top of the nose, between the eyes. Check the bar length. Ask a piercer to measure it. The width of your nose is not the bar size.
Shop bridge jewellery
This sits on the side of the nose. For a ring, check the width inside it. For a stud, check the part of the bar that sits in the hole. A bent stud needs a shape check too.
Shop nostril jewellery
This sits under the middle of the nose. Check the width inside a ring that fits. Shaped rings may have a different inside height. Ask a piercer if you are not sure.
Shop septum jewellery
Choose the right spot below. Jewellery near the mouth should not rub your teeth or gums. Ask a piercer to check the fit.

Bite can mean more than one style of lip piercing. The picture shows one example. Check each hole on its own. Two holes may need different sizes.
Shop bite jewellery
This sits in the cheek. Cheek size can change with swelling. Ask a piercer to measure the bar for you. Do not guess from a lip bar size.
Shop cheek jewellery
This goes up and down through the top lip. It uses a curved bar. Ask a piercer to check its length and the space at both ends.
Shop jestrum jewellery
This sits below the bottom lip. Check the bar between the top and flat back. Do not count the top or back. A vertical labret is a different piercing.
Shop labret jewellery
For a stud, check the bar length. For a ring, check the width inside it. Ask a piercer to check how it sits against your lip, teeth and gums.
Shop lip jewellery
This sits above one side of the top lip. Check the bar between the top and flat back. A piercer can check the space inside your mouth.
Shop madonna jewellery
This sits in the middle, above the top lip. Check the bar length. Do not count the top or flat back. Ask a piercer to check the fit.
Shop medusa jewellery
This sits above the other side of the top lip. Check the bar between the top and flat back. A piercer can check the space inside your mouth.
Shop monroe jewelleryCheck the straight bar between its two balls. A long bar used for swelling may be too long later. Ask a piercer before you choose a shorter one.
Shop tongue jewellery
This goes up and down through the bottom lip. It uses a curved bar. Check the bar length with a piercer. It is not the same as a flat-back lip stud.
Shop vertical labret jewelleryCheck the bar between its ends. Each side may need a different length. Ask a piercer to check the fit. If you want a ring, it needs its own size check.
Ask a piercer to measure the fit. Jewellery should not pinch or press into your skin.
If your piercing is new, sore, swollen or still healing, ask your piercer before you change it. Do not pick a shorter bar on your own.
We can explain the sizes on our product pages. We cannot tell your exact size from a photo.
Read more: Choosing jewellery after healing; piercing questions; how jewellery sizes work.