What gauge is a nose piercing?

Most nostril piercings are done at 20 gauge (0.8 mm) or 18 gauge (1.0 mm). In the United States 20g is the most common starting size, while 18g is slightly thicker and popular in Europe and for anyone who wants a sturdier post. Thinner 22g (0.6 mm) jewelry exists but is usually too fine for a fresh piercing and bends easily.

How do I know my nose ring size?

Measure a nose ring you already wear, or ask the studio that pierced you. Gauge is the thickness of the post or wire, and for a hoop you also measure the diameter, which is the width of the inner circle across the middle. A caliper or a printed sizing chart gives the most accurate reading. If you are guessing for a healed nostril, 20g and an 8 mm hoop are the safest defaults.

What size hoop is best for a nose ring?

For a nostril, an 8 mm inner diameter suits most noses and sits close to the skin without gaping. Smaller 6 mm hoops hug tight and look subtle, while 10 mm reads as a looser, more visible ring. The right size depends on how far your piercing sits from the edge and rim of your nostril, so measure rather than guess.

Can I put an 18g ring in a 20g piercing?

Not comfortably in a fresh piercing. Forcing a thicker post through a healing channel tears tissue and sets back healing. A fully healed nostril can sometimes be stretched slightly to take 18g, but that should be gradual, not forced in one go. If your piercing is new, match the gauge you were pierced at.

What is the difference between a nose bone, an L-shape, and a nose screw?

They are three ways to hold a stud in the nostril. A nose bone has a small fixed ball on the end that anchors it, an L-shape has the post bent into an L, and a nose screw has a curved or twisted tail that hooks against the inside of the nostril. All three come in the same gauges. The choice is about how secure the fit feels and how easy it is to insert.

Nose Ring Sizes: Gauge, Length, and Diameter Guide

Most nose piercings use 20 gauge (0.8 mm) or 18 gauge (1.0 mm) jewelry, and nostril hoops most often measure 8 mm across the inside. Those two numbers, gauge and diameter, are what “nose ring size” really means. Gauge is the thickness of the metal, and diameter is the width of a hoop’s inner circle. This guide gives you the full gauge-to-millimeter chart, the length and diameter ranges for each nose jewelry shape, and a simple way to measure your own jewelry so a new piece fits on the first try.

If your piercing is still healing, the safest move is to match whatever the studio pierced you at. Guessing a size and forcing it in is the fastest way to irritate a fresh nostril.

What gauge means

Gauge is the thickness of the jewelry post or wire, measured on a numbered scale where a bigger number is thinner. A 20 gauge nose stud is thinner than an 18 gauge one, which trips people up the first time. The scale runs backward on purpose, carried over from wire manufacturing.

For nostril piercings the working range is narrow. Nearly all sit at 20g or 18g, with 22g as a thin option and 16g as an occasionally thicker one. That is a much tighter range than ears, where cartilage often starts at 16g. A nostril does not need a thick post, and a very thin one bends and is easy to lose.

Nose gauge chart

These are the standard gauge sizes for nose jewelry, with the millimeter equivalent for each. Millimeters are the reliable measurement, since gauge numbers can vary slightly between manufacturers.

Gauge	Diameter (mm)	Diameter (inch)	Where it fits
22g	0.6 mm	0.025 in	Thin, delicate studs; bends easily, not ideal for fresh piercings
20g	0.8 mm	0.032 in	Most common nostril size, especially in the US
18g	1.0 mm	0.040 in	Slightly thicker, common in Europe and for sturdier hoops
16g	1.2 mm	0.047 in	Thicker nostril or bridge jewelry, less common for standard nostrils

If you are unsure, 20g is the default a piercer reaches for on a standard nostril. Going thinner than the size you were pierced at leaves the channel loose and the jewelry loose with it. Going thicker means stretching, which a fresh piercing cannot take.

Nose jewelry shapes

Nostril jewelry comes in a few shapes, and each one is measured a little differently. Gauge applies to all of them. Length or diameter is the second number that decides fit. Here are the four side by side, each shown passing through the nostril wall so you can see what holds it in.

Nose bone

ball anchors it behind the nostril

L-shape (L-bend)

bent foot tucks against the inside

Nose screw

curved tail hooks the inner wall

Hoop or ring

sized by inner diameter

The gray band is the nostril wall seen edge on. Whatever sits below it is inside the nose, and that end is what keeps each stud in place.

A nose bone is a straight stud with a small fixed ball on the end. The ball is slightly wider than the post, so it anchors the jewelry from behind the nostril. It is quick to put in but the ball has to pass through the channel, so a nose bone suits a healed, settled piercing rather than a fresh one.

An L-shape, or L-bend, is a straight post bent at a right angle near the end. The short foot of the L tucks against the inside of the nostril and holds the stud in place. It is easy to insert and sits securely, which makes it a common everyday choice.

A nose screw is a post with a curved or twisted tail that spirals against the inner nostril wall. It is the most secure of the studs and the least likely to fall out, but it takes a little practice to twist in and out at the right angle.

A hoop or ring is a circle of wire that passes through the piercing, usually a seamless ring or a captive bead ring. Instead of length, a hoop is measured by diameter, the width of the inner circle.

Length and diameter guide

For studs, the number that matters after gauge is the wearable length, meaning the straight part of the post that sits in and behind your nostril. For hoops, it is the inner diameter. Here is the typical range for each shape.

Shape	How it is measured	Typical size	Notes
Nose bone	Post length	6 mm to 8 mm	Fixed ball anchors it; best for healed piercings
L-shape (L-bend)	Post length before the bend	6.5 mm to 8 mm	Secure and easy to insert; a common everyday stud
Nose screw	Post length along the curve	6.5 mm to 8 mm	Most secure stud; twists into place
Hoop or ring	Inner diameter	6 mm to 10 mm	8 mm is the common all-round size

Most nostrils fall in the middle of these ranges. An average nostril takes a stud post around 6.5 mm to 7 mm and a hoop around 8 mm. Thicker nostrils or piercings set farther back may want the longer end, and a very small nose can suit a 6 mm hoop.

Picking a hoop diameter

Diameter decides whether a hoop hugs your nostril or gaps away from it. The right size sits close to the skin and follows the curve of the nostril without pressing into it. Too small and the ring digs in and traps the piercing; too large and it hangs loose and swings.

An 8 mm inner diameter works for most people and is the size to buy if you cannot measure. A 6 mm hoop reads as tight and subtle, good for a piercing set close to the edge of the nostril. A 10 mm hoop is more visible and looser, and it suits a piercing placed higher or farther back where a smaller ring would strain.

The distance from your piercing to the rim of the nostril is what really sets the ideal diameter. A piercing near the edge needs less ring to close the loop; one set deeper needs more. This is why two people with the same nose can want different hoop sizes.

How to measure

You can size a new piece from jewelry you already own with a caliper or a millimeter ruler. Measuring the actual metal beats guessing from a product photo.

For gauge, measure the thickness of the post or wire. A digital caliper reading of 0.8 mm is 20g, and 1.0 mm is 18g. If you only have the old jewelry and no caliper, take it to a studio and they will gauge it.
For a stud, measure the straight post length from the base to where it ends or bends. That is your wearable length.
For a hoop, measure the inner diameter, the gap across the inside of the circle, not the outer edge. Lay the ring flat and measure the widest inside point.
When numbers fall between sizes, match the piercing you were given rather than rounding up a gauge. A stud length can flex a millimeter; a gauge should not.

If you have no reference jewelry and the piercing is healed, start with 20g and an 8 mm hoop or a 6.5 mm stud, then adjust once you see how it sits. For the full cross-piercing breakdown of gauge and length, see our body jewelry sizing guide.

When to change your jewelry

Wait until a nostril is fully healed before switching sizes or shapes, which for most people is around 4 to 6 months. Changing too early, or forcing a thicker gauge, irritates the channel and can cause a bump. A fresh piercing should keep the exact gauge and a slightly longer post that leaves room for swelling, then downsize to a shorter length once the swelling settles.

Once healed, a nostril gives you room to play with shape and material without changing gauge. If you are choosing between metals, implant-grade titanium (ASTM F-136) and solid gold are the safe options, while “surgical steel” is vague marketing language you should question. When you are ready to explore placements and styles beyond a single nostril stud, our guides to types of nose piercings, septum jewelry sizing, and the cultural history of nose rings pick up where sizing leaves off.