This tiny flower stud is only 0.4cm in diameter but the detail is very fine. Match this stud with other small studs or with hoops. Studs, posts and butterfly backings are all 925 Sterling Silver. All articles are hand-made Sterling Silver. Sterling Silver is an alloy containing 92.5% pure silver and 7.5% copper. This makes the metal more durable and apt for jewellery. Sterling Silver is also very easy to clean so you can always maintain your silver jewellery nice and shiny.