Is the belly button deep?

A deep navel is called a deep navel if it is deeper than 1.5 cm, and a shallow navel if it is shallower than 1 cm. The depth of the navel marks a person's congenital physical condition, indicating that the umbilical cord in the mother's body is thicker and the fetus absorbs more nutrients, indicating that the body is in good condition. In the development after birth, the depth of navel is also related to the thickness of subcutaneous fat nearby. In short, deep is full of vitality, shallow is insufficient of qi and blood. Aesthetically speaking, the navel whose bottom is deep and hard to see is more attractive. I don't know what kind of navel the questioner belongs to.