These earrings have been crafted in 9ct Yellow Gold and internally filled with Sterling Silver. These Polished finish hoop earrings are a perfect everyday hoop earring. . Dimensions: 2.5mm wide x 10mm internal diameter. Material: 9ct Gold Outer Core, Internal Sterling Silver. 9ct Yellow Gold Silver Filled Plain Hoop Earrings. 9ct Gold Silver Filled Jewellery is 9ct Gold bonded together with sterling silver for extra strength and affordability.