What you can see here is a simple belly ring. It's made of PTFE and is 1 inch (25 mm) long. It's perfect for pregnancy if you don't want to get rid of your belly piercing, as this belly button ring can be used without problems during pregnancy. PTFE is a very flexible material, so it will follow the development of your baby bump as it grows. 

However, if you think that 1" (25 mm) is too long, you can shorten the PTFE bar with scissors to your desired length. After that, you can screw the bar into the ball again.

At each end of the bar, there's a beautiful acrylic ball. The balls are decorated with a beautiful glitter layer. The balls have a diameter of 1/4" (6 mm), and they're available in a variety of colors. Take a look at the menu on the right of the picture to select your favorite one.