Designed to emphasize and enhance the visual properties of pierced nipples. Our stainless steel shields are hollowed out with slightly elevated discs through which the nipple protrudes, and are held in place by the wearer's jewellery. Approximate Dimensions [Metric/US]: Internal Diameters: 10, 13, 16, OR 19mm Internal Diameters: 3/8", 1/2", 5/8" OR 3/4" Inches Weight: 6 Grams / .20 Oz. Diameter: [10mm / 3/8" Inch] Diameter: [13mm / 1/2" Inch] Diameter: [16mm / 5/8" Inch] Diameter: [19mm / 3/4"Inch]