Official Harry Potter Slider Charm Gryffindor Crest Charm on a silver plated charm bail This charm has been created using a print from the official style guide from Warner Bros. It is approx 20 x 25mm. This charm 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. The Carat Shop are the official licensed manufacturers of Harry Potter Jewellery on behalf of Warner Bros.