Harry Potter fans love the Quidditch Notecard Set by Wizarding World (6003832). It is a 20 notecard set with envelopes and envelope seals included. While fans appreciate what?s inside, they also love the collectible Quidditch chest box the cards come in– the box features 10 styles of rarely seen visual development art centered around the official sport of Hogwarts. How big is the cards? They are 5in x 7.25in. And the box is 8.25in x 5.75in x 3.75in.