Official Harry Potter Platform 9 3/4 Necklace Platform 9 3/4 Charm on a silver plated Necklace This charm has been created using the official style guide from Warner Bros. The charm is approx 15mm in height The Necklace is a silver plated snake chain which is 16 inches in length with a 2.5 inch extender chain This charm comes 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. Official Harry Potter Platform 9 3/4 Necklace Platform 9 3/4 Charm on a silver plated Necklace The famous Platform at Kings Cross Station in which Hogwarts students gain access to the Hogwarts Express This charm has been created using the official style guide from Warner Bros. The charm is approx 15mm in height The Necklace is a silver plated snake chain which is 16 inches in length with a 2.5 inch extender chain This charm comes on the official Harry Po