HARRY POTTER Necklace with Slider Charm - Feather Quill. Silver plated snake chain with a slider charm featuring the Feather Quill known from the Harry Potter books and films. This necklace comes on the official Harry Potter branded card packaging and shows the Warner Bros logo on the reverse. Great souvenir for a true Harry Potter fan. Snake chain measures 16 inches in length with a 2.5 inches extender. Charm dimensions are 5 mm x 30 mm.