Harry Potter 'Hogwarts Crest' Blank Card, Envelope & USPS Harry Potter Postage Stamp Harry Potter Hogwarts School Crest blank greeting or thank you card. Lovely full-color image of the Hogwarts school of Witchcraft and Wizardry crest on front cover. Single 5" x 7" card and white envelope and USPS Harry Potter postage stamp. Great for birthday, graduation, thank you, missing you, get-well-soon, and many other messages. Will include one USPS Harry Potter first class one ounce forever stamp when purchased from Hogsmeade Station Gift Shop.