Hoops: 3mm thick and 18mm outer diameter. Heart charm size: 2cm width and 1.7cm height. Composition: Stainless steel with imitation rhodium plating hoops. 18k Gold Plated Charm. Rhodium is one of our favourite hypoallergenic metals. Is a lustrous, high-quality metal that contains no nickel. SOLD AS A SINGLE EARRING. Please add x2 to cart for the pair. Please note that these earrings are slightly heavier than the glass pieces.