Official Harry Potter Earrings Potion Cauldron Charms on silver plated earring hooks Arguably the most recognisable Wizarding object, the cauldron is used throughout magical life to create potions and spells These charm earrings have been created from the official Warner Bros style guide. Each charm is approx 18 mm. These earrings come on the official Harry Potter merchandise card packaging and shows the Warner Bros logo on the reverse.