Piercing Needles: How to Choose Gauge, Length & Coating

Seven checks. Two minutes. Every box you open.

Your client never sees the needle. They feel it.

Piercing needles touch every piercing you do. Yet many are bought on price alone. This guide gives you seven checks for any box: gauge, diameter, length, shape, coating, sterility and paperwork. Each check takes seconds.

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How to choose piercing needles: 7 checks before you buy

What is a piercing needle?

A piercing needle has one job: to open a clean channel that the jewellery can follow.

A body piercing needle is a hollow steel tube with a sharp, ground point and an open back end. It has no hub and no plastic parts. The jewellery follows it through, held against its back end or on a taper or pin.

• Point: the very tip. It enters the skin first.
• Bevels: the ground faces behind the point. They cut the tissue and open it.
• Heel: the back of the bevel. It stretches the cut into a round channel.
• Wall: the steel between outside and inside. The outer diameter is the gauge.
• Lumen (bore): the hollow inside. It decides which pins and tapers fit in the back end.
• Back end: the open end the jewellery follows. It should be clean and free of burrs.

Tri-bevel piercing needles: how the grind works

Most piercing needles made today are tri-bevel. The three facets work in order:

1. Point: a very fine bevel that enters first.
2. Cutting bevel: a longer face that makes a small crescent-shaped cut.
3. Heel: it opens the crescent into a round channel.

The grind matters. In studies on medical needles, blunt grinds needed more force to enter and caused more skin trauma. A tiny hook on the tip did the same: in one study, a hook of 0.05 mm raised both. Judge any grind on a test needle, with the checklist below.

Hollow piercing needle or cannula?

A hollow piercing needle works on its own: the jewellery follows it through the channel. A cannula is a needle inside a flexible plastic sheath. After the pass, the needle comes out and the sheath stays in. The jewellery then goes in through the sheath. This is often called the “European method”.

The two systems use different stock and are sized on different scales. This guide covers hollow piercing needles.

Piercing needle gauge chart: 18G to 14G in mm

Start from the jewellery, then choose the needle.

A higher gauge means a thinner needle. Most professional work sits between 18G and 14G. The piercing industry rounds the sizes like this:

Piercing needle size by placement

These are common starting gauges for initial piercings. Anatomy and the jewellery always come first, and there are always exceptions.

Surface piercings and dermal anchors often use other tools, such as cannulas or punches. This guide focuses on standard piercings.

Same gauge as the jewellery, or one size up?

For most piercings, the needle matches the jewellery. In cartilage, some piercers use a needle one size larger to give the jewellery a little room. That is a technique choice, not a default.

Avoid two mistakes. A needle much larger than the jewellery leaves it loose in the channel. A needle smaller than the jewellery forces the jewellery to stretch the fresh channel. Jewellery that is too thin for the placement can also migrate or reject. Our guide to flat back and threadless labrets covers the jewellery side.

Piercing gauge and hypodermic gauge are different scales

Medical needles use a different scale. A hypodermic 16G needle is about 1.6 mm, the size of a 14G piercing needle. A hypodermic 18G is about 1.3 mm, a little thicker than a 16G piercing needle. Wire-gauge tables differ again. Always compare the diameter in millimetres.

Piercing needle length: 25, 50 or 76 mm (1″, 2″ or 3″)

The right length is the one you can hold steady.

Length is mostly about control, not only tissue thickness. Ask yourself three questions:

1. How far does the needle travel? It must cross the tissue and leave room for the jewellery to follow.
2. What supports the tissue? Clamp jaws and receiving tubes add distance to cover.
3. Where is your hand? A longer needle keeps your fingers further from the client. A shorter one is easier to steer in tight spaces.

• 25 mm (1″): short freehand passes in tight spaces, such as the ear.
• 50 mm (2″): the standard length for most ear and facial work.
• 76 mm (3″): longer passes, or when clamps or a receiving tube sit between you and the exit point.

Needle length with freehand, clamps or receiving tubes

• Freehand: the most freedom. Shorter needles give the most direct feel.
• Clamps or forceps: the needle must cross the jaws as well as the tissue, so allow more length.
• Receiving tube: it supports the tissue and catches the needle, for example on a nostril. Check that the tube accepts your needle gauge.

A bevelled tip is not symmetrical, so a needle tends to bend slightly in soft tissue. Support the tissue and keep the pass straight.

Straight, curved or hooked piercing needles

Let the anatomy choose the shape.

Straight needles cover most work. When entry and exit are not in a straight line, a shaped needle follows the anatomy for you.

Curved piercing needles

A curved needle follows the natural curve of the tissue. It helps on angled or hard-to-reach placements such as the rook and daith, and on some genital piercings. KILA curved piercing needles come in 16G.

Hooked piercing needles

A hooked needle has a tight curve near its end. It is used where a straight needle cannot reach the exit point, for example in some genital and surface work. Hooked needles are usually sold in few gauges, so check before you order. KILA hooked piercing needles come in 16G.

Silicone-coated or uncoated piercing needles?

Coated or uncoated, the last needle in the box must feel like the first.

A silicone coating lowers friction, so the needle needs less force to pass through tissue. Studies on medical needles agree: needles without lubricant needed more force and caused more skin trauma. Many piercers also find the transfer smoother.

Some piercers prefer uncoated needles for more feedback in the hand. Both are valid. What matters is that every needle in the box behaves the same.

Under the coating, 316L surgical stainless steel is a common choice. Sharpness comes from the grind and from quality control.

The transfer: from piercing needle to jewellery

The pass is not finished until the jewellery is in place.

The jewellery has to follow the needle without catching the tissue. There are three common methods:

• Butting: the end of the jewellery is held against the back of the needle and follows it through.
• Taper: a tapered pin sits behind the needle and the jewellery follows the taper. It makes tricky transfers easier.
• Pin in the bore: for threadless jewellery, a pin or transfer tool sits inside the back of the needle. The fit depends on the bore, so check it for each gauge you use.

For initial piercings, use internally threaded or threadless jewellery. An external thread drags a rough surface through fresh tissue. Before you use a new box on a client, test that your pin or taper sits firmly in the back end.

Sterile piercing needles: why ethylene oxide (EO)

The sterilisation method must protect the coating as well as the client.

Ethylene oxide is a gas process that sterilises at low temperature and without radiation. That suits needles with a silicone coating. Gamma radiation also sterilises well, but it can make some silicone lubricants thicker and less slippery. After EO, products are aired out so that gas residues fall to safe levels.

Each wrapper is a “sterile barrier system”: the smallest package that keeps germs out until you open it. The outer box only protects the wrappers in transport. So check two things on every needle:

• Individual sealing: each needle in its own sterile wrapper.
• Expiry date and lot number on the wrapper: not only on the outer box.

In France, health inspectors check that sterile, single-use material is within its expiry date. The lot number is good practice: write it in each client record and every piercing can be traced to its batch.

Piercing needle checklist: 2 minutes when a box arrives

Check every box when it arrives, not when the client is in the chair.

It is good practice, not a legal standard. The tip check mirrors the visual check used for medical needles.

Piercing needle documents and EU rules

Read the documents before you order, not after a problem.

Before you order, ask your supplier for two documents:

• Declaration of Conformity: a signed document. The manufacturer names the product and the EU rules it declares it meets.
• Instruction manual: intended use, storage conditions, warnings and disposal.

Not a medical device. A needle made only for body piercing has no medical purpose, so the Medical Device Regulation (EU) 2017/745 does not cover it. Its Annex XVI lists some non-medical products that the regulation still covers. Piercing needles are not on that list, and piercings are explicitly excluded.

No CE mark. EU law allows the CE mark only where a specific EU law requires it. No such law covers piercing needles. So a needle made only for piercing should not carry a CE mark. Medical needles, such as cannulas, are medical devices with a CE mark.

General product safety. The General Product Safety Regulation (EU) 2023/988 has applied since 13 December 2024. It replaced Directive 2001/95/EC. European Commission guidance says products used directly on clients during a service can be covered.

Storing and using sterile piercing needles

A needle stops being sterile when the seal is damaged or the date has passed.

Follow the storage range in the manufacturer’s manual. For KILA, it is 18–22 °C, in a cool, dry, indoor place, away from steam, direct sunlight and heat sources. Seal leaks can be too small to see, so treat any wrinkled, creased or partly open seal as non-sterile.

• Check the expiry date before each use.
• Open the wrapper at the moment of the procedure, in front of your client.
• Never let the tip touch a non-sterile surface.
• One needle, one client. Never reprocess, re-sharpen or reuse a needle.
• Put used needles in a sharps container right after use.

In France, used needles are treated as DASRI (infectious healthcare waste). Use a yellow sharps container to standard NF X 30-500, sign a contract with a DASRI collection service and keep the tracking slips for three years. For your clients’ aftercare, see our guide to piercing healing stages.

KILA piercing needles: designed in Italy by professional piercers

KILA is our own needle line, designed in Italy by professional piercers. Here is the KILA specification, check by check.

Lot number and expiry date on every wrapper. Not only on the box.

KILA needles are intended for use by trained professionals only.

Piercing needles: frequently asked questions