Official Fantastic Beasts Licensed Keyring. This Stupefy Keyring is an exact replica of the actual prop used in the Fantastic Beasts films. It is approx.30mm in size. Made from brass-plated metal. It is antique brass plated. This is a genuine collectors item. Please take a look in our Amazon shop for our full range of Official Harry Potter Charms, Necklaces, Earrings and Bracelets. Comes on official gift card.