They're so comfortable and light, you may forget they're even there. These huggies also make a great option for stacking if you have multiple piercings. Material: 18k Gold Plated Sterling Silver Size: 13x2mm Origin: California, USA Material This piece has 925 Silver at its core and is plated in a thick layer of gold measuring 2.5-3.0 microns. It is nickel-free and 100% hypoallergenic for the benefit of those with sensitive skin.