Bijoux de piercing portés - Obsidian - Hestia / Butterfly / Bosona / Sigma

SIGMA

€32,00

Vendu à l'unité

Color: Gold

Size: 8mm

Size Guide - Piercing Jewelry

Find the right size for your piercing, placement by placement.

The sizes shown are for your final jewelry, once the piercing has healed. The bar fitted at the time of piercing is deliberately longer: do not use it as your reference when ordering.

Illustration - How to measure your jewelry - Obsidian Piercing

Lengththe post only, from base to tip, without the ends

Diameterthe inside of the hoop, measured at its widest

Thickness1.2 mm standard · 1.6 mm nipple, navel, tongue · 0.8 to 1 mm nose

Which thickness (mm) should you choose?

The standard1.2 mm

We pierce at 1.2 mm almost every time, like most piercers. If a professional pierced you, your jewelry is very likely this thickness.

Pierced at a jewelry counter or with a gun?often 0.8 or 1 mm

You can wear a 1 mm labret, which fits that hole, or move up to the standard 1.2 mm with an insertion taper (a small cone that eases the jewelry through). When in doubt, measure the piece you are wearing.

Want a thinner hoop?1 mm or 0.8 mm

Once the piercing has healed (the point at which a hoop becomes possible), you can go for a thinner hoop, in 1 mm or 0.8 mm. For labrets, 1.2 mm remains the reference: going thinner is only useful to fit a narrow hole (see above).

Ear

Lobe

Bar (labret)1 / 1.2 / 1.6 mm · 6 to 8 mm

Depending on how thick your lobe is. The closer the fit, the more comfortable the bar.

Hoop1.2 or 1.6 mm · ⌀ 8, 10 or 12 mm

8 = close to the lobe · 12 = roomier

Hoop: can be fitted straight away, from the day you are pierced.

Helix

Bar (labret)1.2 mm · 6 or 7 mm

Fully healed? The shorter one will be the most comfortable.

Hoop1.2 mm · ⌀ 8 or 10 mm

8 = close to the cartilage · 10 = more open

Shorter bar: ~2 months (check-up visit) · hoop: 6 months recommended.

Conch

Bar (labret)1.2 or 1.6 mm · 7 or 8 mm

Hoop1.2 or 1.6 mm · ⌀ 10 or 12 mm

The diameter should clear the outer ear without pressing on it.

Shorter bar: ~2 months (check-up visit) · hoop: 6 months recommended.

Tragus

Bar (labret)1.2 mm · 6 or 7 mm

6 mm in most cases.

Hoop1 or 1.2 mm · ⌀ 6 mm

Shorter bar: ~2 months (check-up visit) · hoop: 6 months recommended.

Daith

Hoop1.2 mm · ⌀ 8 or 10 mm

Hoop: possible from the day you are pierced. A horseshoe is a better choice for the first few months, while it heals.

Rook

Curved barbell1.2 mm · 7 or 8 mm

Hoop1 or 1.2 mm · ⌀ 6 mm

Hoop: 6 months recommended.

Anti-helix

Bar (labret)1.2 mm · 5 or 6 mm

6 mm in the vast majority of cases.

Hoop1 or 1.2 mm · ⌀ 6 mm

Shorter bar: ~2 months (check-up visit) · hoop: 6 months recommended.

Flat

Bar (labret)1.2 mm · 5 or 6 mm

6 mm in the vast majority of cases. The flat is worn with a bar only, never a hoop.

Shorter bar: ~2 months (check-up visit).

Industrial

Straight barbell1.6 mm · 30 to 40 mm

The length varies a great deal with your anatomy: the safest route is to measure the piece you are wearing, or to ask your piercer.

Nose & face

Nose (nostril)

Bar (labret)1 or 1.2 mm · 7 mm

7 mm recommended · 6 mm once fully healed · 8 mm uncommon

Hoop0.8 or 1 mm · ⌀ 7 or 8 mm

Hoop: 6 months recommended.

Septum

Hoop1.2 mm · ⌀ 8, 9 or 10 mm

8 = discreet · 10 = more visible

Hoop: can be fitted straight away, from the day you are pierced.

Labret / Medusa

Bar (labret)1.2 mm · 7 or 8 mm

Shorter bar: ~2 months (check-up visit).

Smiley

Hoop1.2 mm · ⌀ 8 or 10 mm

Body

Navel

Curved barbell1.6 mm · 10 or 12 mm

Nipple

Straight barbell1.6 mm · 12, 14 or 16 mm

18 mm exists but stays rare. It varies with your anatomy: measure the piece you are wearing, or ask your piercer.

Tongue

Straight barbell1.6 mm · 14 or 16 mm

The safest reference: measure a piece you already wear, or ask your piercer for its size. For personal advice, our piercers welcome you in our studios in France.

Our jewelry comes sealed in a hygiene pouch: check the dimensions through the packaging before opening it.

How to measure accurately

The most reliable method is still to measure a piece you already wear and that suits you. If you cannot measure it (a piece you are unable to remove, for example), ask your piercer for the exact size of the one they fitted.

Bar (labret, barbell): measure the post only, from base to tip, without the ends screwed on at each side.
Hoop: measure the inner diameter, from one inside edge to the other. Do not measure the outside of the circle, that is the most common mistake.
Curved barbell: measure in a straight line from one end to the other, not along the curve.

Jewelry thickness

The piercing standard is 1.2 mm, roughly the thickness of a paper clip. It is the gauge of most ear and face piercings. Areas under more strain, such as the nipple, the navel or the tongue, use 1.6 mm, which suits their healing better. 1 mm gives a finer look on the nose, the tragus, the rook or the septum, and 0.8 mm is reserved for fully healed piercings.

The most common mistakes

Forgetting the downsize. The bar fitted at the piercing appointment is longer than the final jewelry. Once the swelling has gone down, it has to be replaced with a shorter bar. At Obsidian, we take care of this at the systematic check-up, 2 months after the piercing in our studios in France. A bar that is too long catches, moves around and irritates the channel.

Underestimating how much swelling varies. The bar fitted at the piercing appointment is deliberately a little longer, to allow for the swelling of the early days, without being too long: an over-long bar catches and ends up irritating the piercing as well. Everyone reacts differently. More pronounced swelling, because you slept on that ear for example, can make the bar feel too short for a while. That is normal, it has nothing to do with the quality of the piercing, and your piercer will adjust the length if the discomfort settles in.

Switching to a hoop too soon. We recommend waiting 6 months before moving to a hoop, to limit the risk to healing. Cartilage that has not finished healing takes the change badly. Ask your piercer what they think of the state of your piercing. The lobe and the septum, for their part, take a hoop earlier.

Relying on the standards alone. The thickness of your cartilage, the curve of your ear, the depth of your conch: every anatomy is different. These recommendations are professional reference points, not universal certainties.

Healing: how long it takes, area by area

Area	Estimated time
Lobe	2 to 4 months
Helix, tragus, conch, anti-helix	6 to 12 months
Rook, daith	6 to 12 months
Nose (nostril)	3 to 6 months
Septum	3 to 6 months
Labret, medusa	3 to 4 months
Navel, nipple	6 to 12 months

A piercing can look healed on the surface long before it is healed deeper down. Stick to these timings before considering a change of jewelry.

Materials: as decisive as size

On a pierced area, the material stays in permanent contact with your skin: the wrong piece can irritate it, slow the healing down or trigger a reaction.

ASTM F-136 titanium is our reference material, and the one we recommend for a first piercing. Biocompatible and nickel-free, it is the grade of titanium used for medical devices: the skin tolerates it well, even on a fresh piercing.

Solid 14k and 18k gold is biocompatible too and remains a lovely option on a fully healed piercing. Titanium is still the safest choice during the early stages, however.

So-called “surgical” steel, like most common materials, is not biocompatible: we do not recommend it for piercings.

Every piece we offer, we fit it and pierce with it ourselves, every day, in our studios in France. That is the most honest guarantee we can give you.

In stock

30 days to change your mind

Safe & lasting materials

2-year warranty

Play the stacking card with elegance. Its double-row effect, pairing polished titanium with sparkling zircons, draws in the light for a luxurious finish. Ideal on a helix or a conch, it goes on in a single move thanks to its secure clicker.

Specifications

There are several reasons to choose our titanium for its excellence:

Material: ASTM F-136 titanium.
Stones: Set with white zirconia crystals.
Safety: Hypoallergenic, biocompatible and guaranteed nickel-free.
Resistance: Water-resistant.
Closure system: Clicker + Gold PVD or mirror-polished silver finish.

📦 Included: Sold individually

Placements & Recommended Sizes

LOBE

Thicknesses: 1.2 mm
Diameters: 8 mm, 10 mm

HELIX

Thicknesses: 1.2 mm
Diameters: 8 mm, 10 mm (wider look)

CONCH

Thicknesses: 1.2 mm
Diameters: 10 mm (snug, even tight fit)

SEPTUM

Thicknesses: 1.2 mm
Diameters: 8 mm, 10 mm

Every morphology is unique — these sizes are for guidance. Our size guide helps you choose. For personalized advice, our online customer service or our piercers in our studios in France are happy to help.

SIGMAGold / 8mm

€32,00

Chosen by our piercers, fitted every day

Our co-founder has been piercing for more than fifteen years. Every piece we sell is one we wear and fit every day in our stores in France. We want to give every online customer the same attention, the same standard. You get the rigor of a team that puts its craft and its reputation behind every piece.

More than 15 years of expertise
Fitted in store every day
Piercers who listen

Your skin doesn't compromise

Piercing jewelry is worn in the shower, during sport, in your sleep. Materials that sit against your skin 24 hours a day aren't a marketing question. They're a health one. Certified biocompatible ASTM F-136 titanium, solid 14k and 18k gold: every material is chosen for how well your body tolerates it.

Certified biocompatible titanium
Lasting quality, constant comfort
Suited to sensitive skin

5 stars: 17 (81%)
4 stars: 4 (19%)
3 stars: 0 (0%)
2 stars: 0 (0%)
1 star: 0 (0%)

Très joli

Très joli, très facile à mettre. Tient bien et ne gêne pas pour dormir. Pris en 8mm couleur titane et associé à un trinité zircon titane également. J'ai mis pareil aux 2 lobes ;-)

Parfait

Parfait, mis sur mes deuxièmes lobes en cicatrisation.

Incroyable

Il fit parfaitement, j’ai pris le 10 mm pr le conch. À voir pour la qualité.

J’adore le rendu !

Magnifique, c’est un bijou très distingué.
Pour info, je porte au lobe le Michael en taille 10mm, ensuite l’anneau Sigma en 8mm et Trinity Zircon au 3eme trou

Parfait

Très beau bijoux, conforme à la description. Je recommande ;-)

Anneau hélix

Très jolie percing, parfait pour l’elix
De bonne qualité a voir dans le temps

le même en 12mm c’est possible ?

Bijoux en titane, meilleur matériaux pour éviter les allergies.
Très jolis malheureusement la taille ne convient à pas l’emplacement que j’aurais souhaité (conch il m’aurais fallu du 11 ou 12 mm).
Bon service après vente le remboursement a été fais sans souci.

Parfait

Le piercing est magnifique et de très bonne qualité !

Très joli

Anneau très joli, j'arrive même à dormir avec. Attention un peu plus large qu'une boucle d'oreille. Livraison rapide

Superbe

Magnifique bijou qui brille et qui m’a l’air de qualité, à voir maintenant sur le long terme, je l’ai pris en 10 mm pour le conch et c’est parfait

magnifique

Il est aussi beau et brillant que sur les photos, il convient parfaitement.

Super jolie

Il rend vraiment bien, très brillant

Magnifique, service client parfait

L’anneau est magnifique et est facile à mettre !!!

Stunning

Il fit parfaitement pour le conch. J’ai pris 10 mm et c’est parfait.

Beau mais trop gros

Aussi beau que sur les photos, superbe qualité, mais trop épais pour mon hélix
Je n’ai pas réussi à le porter… peut être essayer d’aller chez un perceur pour qu’on me le mette… impossible de rentrer l’anneau sur mon hélix qui a actuellement une barre

Percing Sigma

Bijoux de qualité. J'ai juste eu un problème de fermeture sur le bijoux mais le SAV (Charléne) à su rapidement répondre à mon problème et ma renvoyé un nouveau. Merci.

Magnifique

Parfait pour hélix !
Joli, agréable à porter et de qualité.

Dommage

Le bijou est magnifique mais je suis déçu de ne pas pouvoir le mettre car même si idéalement il ne convient pas pour le conch les 10 mm n’est pas une taille adaptée pour mon oreille. J’aimerai beaucoup que le 12mm soit disponible pour ce piercing.

Piercing Sigma

Très joli piercing boucle d'oreille que j'ai mis sur mon lobe. Commandé en couleur argent. Je suis allergique au nickel

Super jolie !

La qualité est super, le bijou est très facile à mettre et ne bouge pas ! Je recommande à 100 % :)

Au top

Livraison ultra rapide et piercing trop trop beau 😍 je suis fan!

frequently asked questions

Shower, pool, sea: can I keep my jewelry in?

Our jewelry is designed to be worn permanently, including in the shower, in the pool or in the sea. ASTM F-136 titanium and solid gold are unaffected by water, chlorine or salt. You don't have to think about it.
Ideally, do rinse your jewelry with clean water after a swim in the sea or in a chlorinated pool.

My piercing is new — can I wear this piece?

All our jewelry is made from ASTM F-136 titanium or solid gold, the only two materials recommended during and after healing. For a piercing that's still fresh, we recommend checking with your piercer before any change. Our customer care team and our piercers in our stores in France can guide you too.

Single or pair: what does the price include?

Each piece is sold individually, leaving you free to build your own combinations. When a pair is offered, it's stated on the product page.

Is this piece suitable for sensitive skin?

Yes. The ASTM F-136 titanium we use is nickel-free and recognized for its biocompatibility, which makes it well suited to sensitive skin. That's exactly why we chose to work only with materials of this standard.

Will my jewelry keep its shine over time?

Our materials are chosen for how they hold up over time. Titanium doesn't tarnish, and solid gold keeps its shine with no surface treatment. Unlike plated or gold-filled jewelry, there's no layer to wear away.

How do I choose the right size for my piercing jewelry?

Every piercing has its own dimensions, which vary with the area and your anatomy. Take a look at our size guide on the site, or contact us directly: our piercers and our customer care team can point you in the right direction.