Pooqdo (TM) Hot Sell Butterfly Dangle Ball Button Barbell Bar Belly Navel Ring Body Piercing Silver. Material: Stainless steel , rhinestone. Rod diameter: 1.5 mm 0.0591 inch. Bar length: about 10 mm 0.394 inch. Ball Diameter: 5mm (0.197 inch) 8mm (0.315inch). Loop: about 18 * 13mm 0.71 * 0:51 inch. Overall length: 70mm 2.76 inch. Fine look and healthy, not allergic. Nice flower shape makes it more attracting.