The Official Dumbledore's Army (D.A.) mug is here. Be part of the secret organization initiated by Hermoine, Harry, and Ron dedicated to teaching fellow members proper defense against the Dark Arts. The Wizarding World of Harry Potter Dumbledore's Army 14 oz. Mug measures about 5 1/4-inches wide x 4 1/8-inches tall x 3 1/3-inches long. Hand wash only. Not dishwasher safe. Do not microwave.