Glitter belly ring has 5mm top ball, 8mm bottom ball. The bar can be cut to whatever length you prefer. They are about 1 inch, which are plenty long enough to get you through pregnancy. Our bars are not the cheap plastic bars you may have seen elsewhere. Our bars are soft and smooth and Ultra Flexible. We are the original manufacturer of cut to fit threaded flexible belly rings. It is our suggestion that no matter who you buy from, you cut the bars down to the size you need so they stay sanitary, and smooth. See our help pages for more on how to re-size and care for your belly ring. We have other colors and styles available. click on our brand name (Maternity Piercings) to see our other items.