Question: what are the dimensions of a standard playing card?
Answer: The simple answer is that the dimensions of the common playing card is approximately B8 size, 62mm wide by 88mm length (2.45 inches by 3.5 inches). The not so simple answer is that for Bridge, playing cards are 2.25 inches by 3.5 inches, and for Poker, playing cards are 2.5 inches by 3.5 inches.