This non-piercing nipple ring shield is made of nickel-free 316L surgical steel and features adjustable screws for a customized fit. The circle diameter is 19mm and the ball diameter is 5mm. The balls are unscrewable and the package includes 1 nipple ring. This ring is a great option for those who want the look of a nipple ring without the commitment of a permanent piercing. The four screws of the shields are adjustable.Screw length:8mm/0.314inch,you can adjust the screws according to your size.Circle Diameter:19mm/0.748inch .Ball diameter:5mm/0.196inch,balls are unscrewable.Package includes: 1 x Nipple Ring