Official Harry Potter Earrings - 3 Pack. Deathly Hallows, Platform 9 3/4 & Snitch. Charms on silver plated earring hooks These charm earrings have been created from the official Warner Bros style guide. Each charm is approx 15 mm. These earrings come on the official Harry Potter branded card packaging and shows the Warner Bros logo on the reverse. The Carat Shop are the official licensed manufacturers of Harry Potter Jewellery on behalf of Warner Bros.