Tongue piercing is most popularly done with straight barbell. 14 Ga is the most general gauge used. In order to give room for swelling, the initial length of the pierced barbell should be at least 3/4″. When the tongue piercing is completely healed, you can change the tongue to a more common length of 9/16”. Most straight barbell tongue rings have right-handed threads.
There are approximately about 5 types of straight barbell tongue rings. The internally threaded barbell tongue rings are little bit more expensive than outer threaded straight barbell tongue rings
as there will be additional machining and labor involved. It is also thought superior to the external straight barbell tongue rings, as it is less likely to cause loss an irritation especially at the time of piercing. The bead in an internal threaded tongue ring has a receiving tube machine into
it with a threaded post extending from the center, which mates with the threaded receiving tube on the bar.
The externally threaded straight barbell tounge rings has become less common as the popularity of the internally threaded increased. It is named so because shaft of the bar has threads at both ends to allow beads with receiving threads to be attached.
Curved barbell body jewelry is also famous, as a navel curve and are named because of their curvature. It is mechanically identical to straight barbell tongue rings, instead of that they are curved. Curvature on a curved barbell tongue ring can range from almost straight to circular, with some barbells basically being spiral, with the ends overlapping but separated to allow the insertion
of the body jewelry. Curved barbell tongue rings can either be internally or externally threaded.
Also famous as a navel curve or curve, so named because of their curvature. A curved barbell is mechanically identical to a straight barbell, instead for being curved. Curvature on a curved barbell can range from circular to almost straight, with some barbells actually being spiral, with the ends overlapping but separated to permit the insertion of the body jewelry. A variation on this design is a J-bar, a slightly curved barbell
banana barbell with a 90 degree bend near one end, used in vertical navel piercings to position the decorative end of the body jewelry more appropriately. They can be either internally threaded or externally threaded.
Circular barbells, also famous as horseshoe barbells are used in many types of piercings. They are named so due to their shape.
Surface piercings use surface bar tongue rings To use this tongue ring in a surface piercing, two 90 degree bends need to made in the same direction. Because of this design the pressure that would be
affected by other body jewelry designs that participate to rejection in healing surface piercings is minimized.