A standard playing card is usually about 2.5 inches wide by 3.5 inches tall, which is roughly 63.5 mm by 88.9 mm.

Standard card size

  • Most modern “poker size” decks use 2.5 in × 3.5 in (about 6.35 cm × 8.89 cm).
  • This size is common for casino games like poker and blackjack, and many board/card games.

Other common variations

  • Bridge cards are a bit narrower than poker cards but similar in height.
  • Large or jumbo cards can be around 3.5 in × 5.75 in or bigger, used for visibility or stage tricks.

Information gathered from public forums or data available on the internet and portrayed here.