Young Blonde Girl Reveals Her Necklace, Earrings, Navel Piercing, Pink Blouse And Panties At The Tree In The Deciduous Forest

Most kinds of ring or bar jewelry can be worn in a navel piercing. Navels are most often pierced with a curved barbell, which is recommended to be worn until the piercing has fully healed. A wide variety of decorative jewelry is available for navels - simple curved barbells, barbells with dangling pendants, and captive bead rings are common examples.
There has been a special standard established for navel barbells (also called "bananabells" or "bananabars", reference to their curved shape). The standard bananabell is 1.6 mm (1/16") thick and 9.5 mm (3/8") or 11.1 mm (7/16") long and is most commonly referred to as a 14-gauge post. The silver caps on either side of the simple barbell post usually measure 5mm in diameter for the upper and 8mm in diameter for the lower.
Although navel bananabells are different from full rings - like captive bead rings (or CBR), which can also be worn in navel piercings - internet body jewelry retailers and wholesalers tend to refer to these barbells as belly button "rings".
A new version of navel jewelry is on the market for those without pierced navels, which is based on the idea of clip-on earrings.