How to Read a Piercing Jewellery Listing
Buying piercing jewellery online means reading a short string of numbers and knowing what they mean. A listing like "16G 8mm 3mm titanium threadless" tells you everything you need, if you can decode it. Here is how to read a piercing jewellery listing so you order the right fit, and the warning signs that tell you to shop elsewhere.
Vanhess sells piercing jewellery in Coquitlam; we do not perform piercings. Get pierced at a professional studio, then use these guides to choose safe, well-fitted jewellery from us.
The numbers in a listing
A listing usually gives three measurements. First the gauge, written with a G, like 16G, which is the thickness and must match your piercing. Then the length or diameter in millimetres: for a stud or barbell that is the wearable length, for a ring it is the inner diameter. Some listings add a third size for the decorative top or ball, like a 3 mm gem. So "16G 8 mm 3 mm" means 16 gauge, 8 mm post, 3 mm top. Match the gauge and length or diameter to your own piece.
Units, order, and fittings
Gauge is in the G system; lengths and diameters are in millimetres. The order is usually gauge first, then length or diameter, then top size, but not always, so read the labels rather than assuming. A good listing also states the fitting, threadless or internally threaded, and the exact material, such as implant-grade titanium or 14k solid gold. Those two details matter as much as the measurements, because they decide whether the piece is safe and how it attaches.
Red flags in a listing
A listing tells you a lot by what it leaves out. Be wary if it does not state the exact material and standard, if it only says "surgical steel" with no grade, or if it advertises externally threaded posts. Vague material claims, no gauge given, or prices that are too good to be true all point to jewellery that is not suitable for a piercing. If you cannot confirm the gauge, size, material, and fitting, treat that as a reason not to buy.
Decoding a listing
| Listing detail | What it means |
|---|---|
| 16G | Gauge (thickness); must match your piercing |
| 8 mm | Post length or ring inner diameter |
| 3 mm | Size of the decorative top or ball |
| Threadless / internally threaded | How the end attaches; both are good |
| Material | Should state implant-grade titanium or solid gold |
What to check when you buy piercing jewellery
Whatever the piece, a few checks keep you safe and comfortable:
- Reputable seller. Buy from a shop that states the material and standard clearly, not a market stall or a mystery online listing.
- The right material. For anything worn in a piercing, choose implant-grade titanium or solid nickel-free gold, and avoid plated or unmarked metal.
- Correct gauge and size. Match the gauge of your piercing and the length or diameter of the placement, so the piece fits without moving or pressing.
- Smooth fittings. Choose threadless or internally threaded jewellery, with a glass-smooth finish and no rough edges or casting pits.
- Ask if unsure. If you cannot tell what a piece is made of or whether it fits, bring it in and we will check it for you.
Common mistakes to avoid
- Cheap or plated metal. Nickel and worn plating cause most "my piercing is reacting" problems. Stay with implant-grade titanium or solid gold.
- The wrong size. A piece that is too long, too short, or the wrong gauge moves, snags, or presses. Match your gauge and get the length or diameter right.
- Changing too early. Swapping jewellery before a piercing is fully healed is a top cause of bumps. Wait for your piercer's go-ahead.
- Externally threaded posts. Screw threads on the outside of a post drag through the piercing. Choose threadless or internally threaded instead.
Fresh versus healed piercings
What you can safely wear depends on whether the piercing is still healing. For a fresh piercing, keep to the safest materials, implant-grade titanium or solid nickel-free gold, in a smooth threadless or internally threaded fitting, and expect it to be fitted a little long or large to allow for swelling, then downsized by your piercer once that swelling settles. During this window, do not change the jewellery yourself or switch to a decorative piece that has not been checked. Once a piercing is fully healed, your options open up: more styles, a wider range of safe metals, and easy changes you can do yourself with clean hands. When in doubt about whether a piercing is ready, ask a professional rather than risk a setback.
Aftercare in brief
Whatever you wear, a healing piercing needs the same simple routine: clean it once or twice a day with sterile saline, keep your hands off it, do not twist or remove the jewellery, and leave it in until a professional says it is healed. Stay out of pools, hot tubs, and lakes, and avoid knocks and sleeping on it in the early weeks. Most trouble comes from cheap metal or the wrong size rather than too little cleaning, so the jewellery you choose matters as much as the routine. Our aftercare guide has the full method, and our guide to bumps versus infection covers what to watch for.
Key Points
- A listing gives gauge (G), then length or diameter (mm), and often a top size.
- Read the labels rather than assuming the order, and match gauge and length to your piece.
- A good listing states the fitting (threadless or internally threaded) and the exact material.
- Red flags: no material or standard, vague "surgical steel", or externally threaded posts.
Frequently Asked Questions
What do the numbers in a piercing listing mean?
Usually gauge, then length or diameter, then top size. For example, "16G 8mm 3mm" means 16 gauge thickness, an 8 mm post length (or ring diameter), and a 3 mm decorative top. Match the gauge and length or diameter to a piece that already fits you.
What order are piercing measurements listed in?
Most often gauge first, then length or diameter, then the top or ball size, but it varies by seller. Read the labels rather than assuming, and if a listing does not label its numbers clearly, that is a reason to be cautious.
What should a good jewellery listing include?
The gauge, the length or diameter, the top size if relevant, the fitting (threadless or internally threaded), and the exact material and standard, such as implant-grade titanium or 14k solid nickel-free gold. Missing material or fitting details are a warning sign.
What are red flags in a piercing jewellery listing?
No stated material or standard, only "surgical steel" with no grade, externally threaded posts, no gauge given, or a price that seems too good to be true. Any of these suggests the jewellery is not suitable for a piercing, especially a healing one.
Is millimetre or inch used in piercing listings?
Millimetres for length and diameter, and the gauge system for thickness. If a listing uses inches, convert carefully to millimetres, and confirm the gauge separately, since gauge is not an inch or millimetre measurement in the listing itself.
Sources
- Association of Professional Piercers — Jewelry for Initial Piercings
- Association of Professional Piercers — Aftercare
General information, not medical advice. See a professional piercer for the piercing itself. Reviewed 20 July 2026.
Visit Vanhess
Not sure a listing is right? Bring the details or the piece to us at 2929 Barnet Highway, Unit 2424 in Coquitlam. Browse our piercing jewellery, or call +1 (604) 653-6449. See the downsizing guide next.