Common belly ring styles include barbells, captive bead styles, and top dangle designs. A barbell belly ring is a slightly curved stud (these are sometimes called banana barbells) with a smaller bead on top and a larger bead at the bottom. The bottom portion, which sits inside the navel, may have a decorative stone or a dangling charm.
Captive bead belly rings are circular and generally recommended for those originally pierced with this style of jewelry. These belly rings come in a variety of metals, and many styles have a small gem or bead at the closure point.
Top drop (or top dangle) styles are shaped like the banana barbell, but the decorative charm is attached at the top of the piercing instead of the bottom.
No matter which style of belly ring you prefer, sellers on Etsy have everything from vintage navel rings to modern, minimalistic designs like belly bars and custom sets of belly rings.