Historical Rules · 1 February 2013
Rule 108.2
Official source text from the 1 February 2013 Rules release
When a rule or text on a card refers to a "card," it means only a _Magic_ card. Most _Magic_ games use only traditional _Magic_ cards, which measure approximately 2.5 inches (6.3 cm) by 3.5 inches (8.8 cm). Certain formats also use nontraditional _Magic_ cards, oversized cards that may have different backs. Tokens aren't considered cards -- even a card that represents a token isn't considered a card for rules purposes.