These Hoop earrings have been crafted with a 9ct Yellow Gold Outer and filled internally with Sterling Silver and feature a plain polished 9ct Yellow Gold Round Tube that measure 2.5mm width and the hoops are 25mm diameter - making these a great every day Hoop Earring. . Dimensions: 2.5mm thickness x 25mm internal diameter. . Material: 9ct Yellow Gold Outer Tube & Internally filled with sterling silver. . 9ct Yellow Gold Silver Filled Plain Hoop Earrings. Every day essential. Gold Hoops. Round Hoop Earrings. * Popular Earring. Great Size for everyday wear. *** 9ct Gold Silver Filled Jewellery is an outer layer of 9ct Gold Tube over a solid core of sterling silver, the same amount of gold used in a hollow piece of jewellery. This ensures your jewellery is as durable as solid jewellery without the price of a solid gold piece.