Regular Size:14 Gauge=1.6mm, 10mm bar length, comfortable size, suitable for most people Flat Bottom & Internally Threaded Design: Flat bottom design provides a comfortable fit, reducing the risk for skin. Excellent internal screw thread belly barbell, firmly screw on and flexibly screw off, not easy to fall off. Hypoallergenic Material: The belly button ring is made of 23grade titanium, which is hypoallergenic and nontarnishing, suitable for sensitive skin. Highly polished barbell surface, lightweight and comfortable, you deserve it Stunning Cubic Zirconia & Opal: The color of belly button ring is so pretty. Unlike dull rhinestones, zircon and opal shine like real diamonds and reflects rainbow gloss in sunshine. If you are looking for a piece of jewelry to add to your collection, this is the one for you Great Choice for Summer Accessories: Perfect match with daily wear, swimsuits, bikinis, summer tops, beach maxi skirts, nightclub mini skirts, etc. It will make you more eyecatching at the beach party