Diamond belly rings, also known as bellybutton rings and navel rings, are worn pierced through the navel. The shape of the navel varies from person to person. Not all navels can be successfully pierced with belly rings. An "innie" navel with a distinct ridge or lip is most likely to be pierced successfully. Navels lacking a distinct ridge often cannot support a belly ring piercing.

A curved barbell is recommended if your waist folds at the navel when you are sitting. In this case a bellybutton ring would be forced to one side causing the piercing to heal crookedly and scar. A curved barbell is also recommended if the navel ridge is not distinct or if the ridge flattens or inverts when the piercee reclines.

Although a belly ring piercing is one of the most popular piercings it can be one of the most difficult to heal. Wearing tight pants or frequent bending at the waist can prolong healing time.