Nose Piercing Gauge Chart: What Size Are Nose Piercings by Placement + Full Sizing Guide

Most nose piercings use 18G (1.0mm) or 20G (0.8mm) gauge jewelry, with 20G being the most common starting size for nostril piercings in the US. Septum piercings typically start at 16G (1.2mm). In the gauge system, higher numbers mean thinner jewelry: a 20G post is thinner than an 18G post, despite the larger number.

Knowing what gauge your nose piercing is matters every time you buy jewelry online. The wrong gauge will not go through your piercing, will damage the channel if forced, or will sit loose and cause irritation. This guide covers the standard gauge for every nose piercing placement, explains the full stud sizing system beyond just gauge, and gives you four reliable ways to find out your current size without guessing.

Understanding the Gauge System: Why Bigger Numbers Mean Thinner Jewelry

The gauge system is counterintuitive for almost everyone who encounters it for the first time, and it remains one of the most consistent sources of confusion when buying nose jewelry online.

In the gauge measurement system, a higher number means a thinner piece of wire. A 20G post is thinner than an 18G post. A 16G post is thicker than both. This system originated in wire manufacturing: each additional drawing pass through a die makes the wire thinner, and the number counts those passes. More passes equals higher number equals thinner wire. The same numbering system carried over into the body jewelry industry.

The practical memory trick is simple: the gauge number goes up as the jewelry gets thinner. When in doubt, check the millimeter measurement listed alongside the gauge on any reputable product page.

The gauge chart shows why the 0.2mm difference between 20G and 18G matters significantly despite appearing small. These two gauges are not interchangeable: wearing 18G jewelry in a 20G piercing requires stretching the channel, and forcing it causes tissue trauma.

Nose Piercing Gauge Chart by Placement

Different nose placements use different standard gauges based on the anatomy of the tissue, the structural requirements of the jewelry, and the professional standards established by the piercing industry. The chart below covers every major placement so you have a single reference for all nose piercing gauge questions.

The master chart confirms that nostril and high nostril piercings share a gauge range, while septum piercings require a noticeably thicker gauge, and advanced placements like rhino, nasallang, and Austin bar require the thickest starting gauge. For a full breakdown of how each placement differs in anatomy, pain, and healing, the different nose piercing styles guide covers all nine major types in detail.

Nostril Gauge: 20G vs. 18G

The nostril piercing is where most gauge questions arise, because both 20G and 18G are legitimate professional starting gauges and both are widely available in jewelry.

20G (0.8mm): The Most Common US Nostril Starting Size

Twenty gauge is the starting point for the majority of nostril piercings performed in US professional studios. It is thin enough to be comfortable for initial healing, widely accepted by the Association of Professional Piercers for nostril piercings, and compatible with the full range of nose jewelry styles including screws, L-shapes, flat-back labrets, and seamless hoops. Most nose stud styles online default to 20G, which is why this is the safe assumption if you do not know your gauge and were pierced at a reputable US studio.

18G (1.0mm): The Thicker Standard

Eighteen gauge is 0.2mm thicker than 20G, which is a meaningful difference when inserting or removing jewelry. Some piercers prefer 18G as an initial gauge because the slightly larger channel can reduce the risk of the piercing tightening too aggressively during healing. Once healed, 18G piercings support more robust hoops and jewelry styles. If you want to transition from 20G to 18G, that process requires gradual stretching under professional guidance and cannot be accomplished by forcing an 18G piece through a 20G channel.

Can You Go Thinner or Thicker?

Twenty-two gauge exists and is used in some South Asian and Middle Eastern markets as a standard starting gauge, but it is not recommended for initial piercings in the US. The very thin post is prone to migration, tearing under minimal force, and producing an elongated piercing channel over time. Sixteen gauge at the nostril is occasionally used by piercers who anticipate the wearer wanting very specific hoop styles, but it is not standard and requires anatomy assessment.

Septum Gauge: 16G vs. 14G

The septum piercing uses a different gauge standard from the nostril for two related reasons: the anatomy of the sweet spot is more robust than nostril tissue, and the jewelry styles most commonly worn in septum piercings carry more visual weight and require a more structurally sound post.

Sixteen gauge (1.2mm) is the professional standard for septum piercings in the US. The vast majority of septum jewelry available online is produced in 16G. If your septum was pierced at a reputable US studio, 16G is almost certainly your size.

Fourteen gauge (1.6mm) is used for heavier septum jewelry, including thicker gauge clickers, ornate statement pieces, and by people who plan to gradually stretch their septum for gauged looks. It requires either starting at 14G or a controlled stretching process from 16G.

One important anatomical note: a properly placed septum piercing goes through the columella, the soft tissue at the base of the septum, not through the cartilage itself. This is why the septum heals faster than most cartilage placements and why the thicker 16G gauge is practical without the complications it might cause in denser tissue.

Complete Nose Stud Sizing: Post Length, Rise, and Top Size

Gauge is only one of three measurements that determine whether a nose stud fits correctly. Buying jewelry based on gauge alone without checking post length and top size is the second most common cause of uncomfortable or problematic nose jewelry, after buying the wrong gauge entirely.

Post length refers to how long the post is from the back disc to where the decorative top begins. During healing, a longer post is fitted to allow space for swelling. Once swelling resolves, the piercing is downsized to a shorter post. Top size refers to the diameter of the decorative end. During healing, a smaller top reduces snagging.

The downsize appointment at six to eight weeks is a standard step in professional piercing care. Keeping the longer initial post beyond that point is one of the most avoidable causes of mid-healing irritation bumps. For a complete breakdown of which jewelry styles work at each healing stage, the nose ring jewelry types guide covers every style from screws to flat-backs to hoops.

Gauge vs. Diameter: Two Measurements, One Purchase

Gauge and diameter are independent measurements that both appear on hoop product listings, and confusing them is the most common mistake when buying nose hoops online.

Gauge measures the thickness of the post that goes through the piercing. Diameter measures the size of the circular hoop from one inner edge to the other. When buying a hoop, you need both numbers to be correct.

High nostril piercings cannot accommodate hoops regardless of diameter, because the placement angle prevents any hoop from following a clean circular path. When choosing between two adjacent hoop sizes, the smaller diameter almost always looks and sits better.

Initial vs. Healed Gauge: Why Your Sizes May Not Match

Some professional piercers use a needle that is one gauge larger than the intended healed jewelry size. A piercer who plans for you to wear 20G healed jewelry may pierce with an 18G needle. The slightly larger initial channel provides more room for swelling and healing tissue to expand without compressing the jewelry.

This practice means your initial jewelry gauge may not be the same as your healed jewelry gauge. It is not universal; many piercers simply pierce at the gauge they expect you to wear long-term; but it is common enough that you should confirm your healed gauge with your piercer rather than assuming it matches the gauge on your initial jewelry receipt.

For the complete timeline of what to expect during each stage of nose piercing healing, including when it is safe to change gauge, the nose piercing healing guide covers the full process from initial swelling to full maturation.

What Happens If You Buy the Wrong Nose Ring Gauge

Understanding what goes wrong with an incorrect gauge makes the sizing information above more concrete and reinforces why checking before purchasing matters.

Too thin (buying a smaller gauge number, such as 22G, for a 20G piercing): the post sits loose in the channel. Over time, the piercing can tighten around the thinner post, making future return to the original gauge difficult. A loose post also moves more than intended, which increases the risk of irritation.

Too thick (buying a larger gauge number, such as 18G, for a 20G piercing): the jewelry cannot be inserted without stretching the channel. Attempting to force it through causes tissue trauma that presents as immediate pain, swelling, and often an irritation bump in the days that follow. Moving from 20G to 18G requires a deliberate stretching process, ideally with professional guidance.

Post too long after the downsizing period: excess post length creates movement with every contact, which is the leading cause of mid-healing nostril irritation bumps. Post too short: the flat back disc gets pulled flush against or into the back tissue of the nostril, creating a pressure bump at the back of the nose that many people fail to connect to a jewelry fit problem.

How to Find Out Your Current Nose Piercing Gauge

If you already have a nose piercing and are not certain of your gauge, four methods will reliably confirm your size.

• Check your piercing documentation. Most professional studios document the gauge used. Ask for your piercing record or check any aftercare sheet from your appointment.
• Look up your current jewelry. If you know the brand and style of your existing nose jewelry, find that product online. All reputable body jewelry brands list gauge in the specifications.
• Use digital calipers. A digital caliper measures the post thickness in millimeters: 0.8mm = 20G, 1.0mm = 18G, 1.2mm = 16G, 1.6mm = 14G.
• Use the professional default. If pierced at a reputable US studio, 20G nostril or 16G septum will be correct for the large majority of people.

Answering Every Gauge Question

The keyword variants below are all asking the same core question from slightly different angles. The answers are consistent across all of them.

What gauge are nose piercings?

In the US, 20G is the most common nostril gauge and 16G is the most common septum gauge. These are the professional defaults for the majority of nose piercings performed in US studios.

What gauge are most nose piercings?

Twenty gauge for nostril piercings and 16G for septum piercings represent the majority of all US nose piercings. High nostril piercings are typically 18G or 20G, matching the standard nostril range.

What size do nose piercings start at?

Most nostril piercings in the US start at 20G (0.8mm) or 18G (1.0mm). Septum piercings start at 16G (1.2mm). Advanced placements like rhino and nasallang start at 14G (1.6mm).

What gauge do nose piercings start at?

The starting gauge also varies slightly by piercer preference and anatomy: some piercers start nostril piercings at 18G when they anticipate the wearer will want to switch to hoops or heavier jewelry styles once healed.

What size are nose piercings usually?

For healed nostril piercings, 20G is the most commonly worn gauge in the US. For healed septum piercings, 16G is standard.

What size are nose piercings in mm?

20G equals 0.8mm, 18G equals 1.0mm, 16G equals 1.2mm, and 14G equals 1.6mm. All reputable body jewelry sellers include the millimeter equivalent alongside the gauge number in their product specifications.

Choosing Nose Jewelry at the Right Gauge

Once you know your gauge, material is the next critical variable. Implant-grade ASTM F-136 titanium is the recommended material for all nose piercings across all healing stages. It contains zero nickel, is significantly lighter than gold, and does not corrode, making it the safest choice for both initial piercings and long-term healed wear.

The nose piercings jewelry collection at Pierced Addiction includes all nose jewelry styles in 20G, 18G, and 16G with gauge and millimeter specifications listed on every product page, so you can confirm your size before purchasing. For the Titanium by Khrysos range specifically, the titanium nose piercings jewelry collection covers flat-back labrets, nose screws, L-shapes, horseshoe barbells, and clicker rings in ASTM F-136 implant-grade titanium with detailed sizing information for every item. For guidance on which jewelry style suits your specific nose piercing type, the freshly pierced nose jewelry guide covers the best options for new and healing piercings.

Conclusion

The gauge of a nose piercing is the most important specification to confirm before buying jewelry online. For most US nostril piercings, that is 20G. For septum piercings, it is 16G. Beyond gauge, post length, top size, and inner diameter all affect fit. Know your gauge, confirm your dimensions, and the purchasing process becomes straightforward.