Even though the belly piercing become popular, but not every one can pierce his belly. The most important thing to consider when you want to pierce your belly is the skin over the navel and check if you have enough space to pierce or not. Normally, the navel piercing doesn't pierce through the true navel, but it pierce on the upper rim of navel. The piercing on the true navel can make only for the person who have an "outie" navel.
The belly piercing does not have only tone shape, it can come as a banana bar or as an "o" ring and also as a fashionable design on the banana bar. Besides that the new version of belly piercing is on the market, fake belly piercing jewelry which is based on the idea of clip-on earrings. This piercing jewelry suit for anyone who don't want to pierce his belly. The standard size of belly piercing jewelry is 0.064 inches or 14 gauge (gauge is the thickness of the wire the jewelry). The most frequent size jewelry for a healed navel is 3/8" or 7/16". The next size up is 1/2" if you prefer something larger, and 5/16" is shorter.
Every where you look these days celebrities on magazine, top models on the cat walk, teenagers on the street, the belly piercing appear there. Cannot deny that jewelries are attractiveness. It may not worse if one time in your life just try to pierce your belly.
Reference :
http://en.wikipedia.org/wiki/Navel_piercing
http://community.tribalectic.com/articles/common-body-piercing-sizing-information
http://www.wisegeek.com/what-are-belly-button-rings.htm
Picture Credit
http://g1wallz.com/belly-piercing-g1-wallpapers/