A pack of nine poker-sized (3.5" x 2.5") trading cards that feature the Sun and planets of our solar system.
The front of the cards consists of a high-resolution image, some general information, and a "Did You Know?" question, while the back lists a number of statistics and interesting facts about the planet. It also has a QR-code that leads to a webpage with more information.
These cards are best printed on card-stock and laminated. They also incorporate a small bleed area around the edges so that slight mis-alignment during printing should not result in important areas of the card being trimmed.