Medieval Costumes - Join the Knights of the Round Table at their costume ball! Costume Craze has a Medieval Costume for you to wear to your next costume party. We have an adult Medieval costume and a child Medieval costume that will be just perfect for you. Medieval Costumes are available such as a Medieval Knight Costume, Lancelot Costume, Guenevere Costume, King Arthur Costume - all your favorite Medieval characters are available from Costume Craze. A Medieval Costume is not just for Halloween!