A hero card is a custom-printed card designed to promote a race team with emphasis on the primary driver(s) and their sponsors. Bigger than a baseball card, hero cards have two standard sizes: 6 x 8 and 8 x 10 (inches).
Card information and driver depiction vary, but most hero cards include photos, information about the driver, race history/highlights, sponsors' names, and contact information. Drivers use hero cards as an oversized business card for autograph sessions, and teams sometimes include hero cards in their media kits.
References
Hero card Wikipedia(Text) CC BY-SA