Protruding (outie)

Protruding belly buttons are also most commonly known as the outie. According to a survey, a significant amount of people that exist have an outie while the other has what is called an “innie”. An outie form of several factors, the one being when the remaining portion of the umbilical cord which is cut when a baby is born goes out instead of getting in.

Deep hollow

As the name suggests, this kind of belly button is deep and will appear if there’s the formation of shadow underneath the belly button’s top slayer. This kind of belly button also has a slightly open mouth. A subcategory of this kind of belly button is a “funnel” belly button which is more commonly seen in people with excess belly fat.

Vertical (typically narrow)

Many people see the vertical belly button as a split belly button because the shape of this navel looks like that the portion of the stomach is a bit split into two. The vertical belly button has minimum folds on its top and looks more like an I which is there on the skin. The vertical belly button, according to the research, is also the most common belly button type.

Horizontal (typically narrow)

The horizontal belly button is also called the T type belly button which has the folds going horizontally. The depression at the top of the navel looks as if the upper line of the alphabet T. This kind of belly button is totally different from a hollow belly button because the upper part of the skin covers the innermost portion of the navel

Round

A round belly button does not necessarily mean that it is an outie navel but it is considered close. It is still in a concave shape and protruding in an inwards direction, but it does not really have any hood or cover at the top, but in place of it, it appears to be symmetrically rounded.

Light bulb

A light bulb shape belly button has really tiny folding on the upper part of the navel, with a somewhat oval shape that channels down as it goes in the downward direction very similar in shape to a light bulb. There have been some comparisons made to the light bulb shape belly button to an upside-down bottle of beer or even a wine bottle.