If you belong to the house of Slytherin then you might want to don one of these Slytherin Crest Silver Plated Necklaces, to show your support for your fellow house mates. The Slytherin charm has been created using a print from the official Warner Bros. style guide and measures approx. 1.5cm x 2cm. The Necklace is a silver plated snake chain which is 41cm in length with a 6cm extender chain. Now you just have to remember your Slytherin password!