Official Harry Potter Logo Silver Plated Slider Charm (Pandora Compatible). This charm has been created using the official style guide from Warner Bros. It is approx 15 mm in height and 15 mm wide. Comes on the official Harry Potter branded card packaging and shows the Warner Bros logo on the reverse. This charm is compatible with our other Harry Potter slider charms, necklaces and bracelets as well as Pandora Bracelets.