Harry Potter is a story about young wizards who battle agaist a Dark wizard called Lord Voldemort. Harry Potter costumes are simply the school uniform of the Hogwarts School of Witchcraft and Wizardry where the young wizards train. The uniform is a grey jumper worn over a white shirt, plus dark grey trousers for boys and skirts for girls with grey socks and black shoes. The costume also requires a red and gold striped tie plus a long black cloak with the Hogwarts school logo on it. Other accessories you should have are a red and gold striped scarf and of course a wizardís wand!