For mouth, eyebrow and cartilage piercings we recommend medical-grade PP-R such as BioFlex®: it spares teeth and gums, and it bends instead of levering the piercing when you sleep on it. For metals, see implant-grade metals. To compare sizes on screen, use the Jewelry Size Visualizer.
Internally threaded
Also called: internal thread
The thread is inside the post; the top screws into it, so the part that passes through the skin is smooth.
Worn in Cartilage, face, lips, navel, nipples, dermals.
The standard for threaded jewellery in a fresh piercing.
Externally threaded
Also called: external thread
The thread is cut into the outside of the post and the ball screws onto it.
Worn in Budget barbells and navel bars.
The rough thread drags through the channel on the way in, so it is not used for fresh piercings.
Threadless
Also called: push-fit, press-fit, push pin
The top has a thin pin, bent slightly, that pushes into a hollow post and is held by spring tension.
Worn in Ear cartilage, lobes, nostril, lips and face.
Smooth like internal threading. The pin needs the right bend: too little and the top can fall out.
Clicker
Also called: hinged segment ring
A ring with a hinged section that swings open and clicks shut; nothing comes loose.
Worn in Septum, daith, helix, conch, tragus, nostril, lips.
The easiest ring to open and close. The hinge can rub in a piercing that has not healed.
Ball closure ring
Also called: BCR, captive bead ring, CBR
An open ring that holds a small ball or bead in its gap by its own tension.
Worn in Almost everywhere: ears, nose, lips, navel, nipples, genital piercings.
BCR is the usual European name, CBR the North American one. Thick rings need ring pliers to open and close.
Segment ring
Like a BCR, but the removable part is a piece of the ring itself, so it looks like a closed circle.
Worn in Septum, daith, helix, lips, nostril.
Hard to put in without pliers, and the loose segment is easy to lose.
Seamless ring
Also called: continuous ring, twist hoop
A single piece of wire with one cut; it opens by twisting the ends sideways.
Worn in Nostril, helix, tragus, lips, lobes.
Never pull it open like a wishbone: that bends it out of shape.
Fixed bead ring
A ring with the bead fixed to one end; it opens by twisting the free end sideways.
Worn in Nostril, ear cartilage, septum, lobes.
The bead cannot be lost; only thin gauges can be twisted by hand.
Labret
Also called: flat-back, labret stud
A straight post with a flat disc at the back and a top at the front.
Worn in Lips, cheeks, nostril, and most ear placements.
The flat back lies against gums or cartilage. The first post is long for swelling and is shortened later.
Straight barbell
Also called: barbell, industrial bar, tongue bar
A straight bar with a removable end on one or both sides.
Worn in Tongue, nipples, industrial, bridge, frenum, ampallang, apadravya.
Not for flat surface piercings or the eyebrow, where its straight shape puts pressure on the ends.
Curved barbell
Also called: banana bar, bent barbell
A barbell bent into a gentle curve.
Worn in Navel, eyebrow, rook, anti-tragus, vertical labret, VCH.
Follows tissue that curves. Not for flat surface piercings or the bridge.
Circular barbell
Also called: horseshoe, CBB
A barbell bent into a horseshoe, with a removable end on each tip.
Worn in Septum, smiley, lips, nipples, daith, genital piercings.
In a septum it can be flipped up inside the nose to hide it.
Surface bar
Also called: staple bar
A flat bar under the skin with both ends turned up at 90 degrees, so the tops sit flat on the surface.
Worn in Nape, sternum, hips, anti-eyebrow and other flat surfaces.
The shape that lets a surface piercing heal; normal barbells reject in flat skin.
Dermal top
Also called: microdermal top
A small disc or gem that screws into the post of a dermal anchor.
Worn in Wherever a dermal anchor sits.
Have it changed by a piercer at first, so the anchor is not twisted loose.
Plug and tunnel
Also called: eyelet, flesh tunnel
A short cylinder for a stretched piercing: solid (plug) or hollow (tunnel), held by flares, O-rings or a screw-on back.
Worn in Stretched lobes and other stretched piercings.
'Gauge' is the size, not the name of the jewellery. Never force a double-flared plug into a fresh stretch.
Retainer
Also called: hider, septum retainer
A discreet piece, clear or skin-coloured, that keeps a piercing open without showing.
Worn in Septum, lips, nostril, tongue, ear, navel.
Used for work, sport, surgery or scans. Medical-grade polymers such as BioFlex® are made for this; cheap acrylic and uncertified copies sold as 'bioflex' are not the same material.
Nostril screw
Also called: nose screw
A stud whose end is bent into a hook that sits inside the nostril, with no back.
Worn in Nostril.
Secure, but trickier to put in than a flat-back labret.
L-bend
Also called: L-shaped nose stud
A nose stud with a right-angle bend at the end.
Worn in Nostril.
Easier to put in than a screw, but comes out more easily.
Nose bone
A short straight stud with a slightly larger ball on the inside end that holds it in.
Worn in Healed nostrils only.
Forcing the end through a healing piercing damages it.
Taper
Also called: insertion taper
A smooth rod that widens gradually, used to guide jewellery into a piercing or to stretch it.
Worn in A piercer's tool; also used for stretching.
Not meant to be worn as everyday jewellery.
Spiral
Also called: twister
A barbell coiled into a corkscrew.
Worn in Healed eyebrow, helix, lips, navel, lobes.
Catches easily; for healed piercings.