Most standard playing cards are about 2.5 inches by 3.5 inches, which is roughly 63.5 mm by 88.9 mm.

Standard playing card size

  • Poker / “regular” cards : 2.5 in × 3.5 in (63.5 mm × 88.9 mm).
  • This is the size used in most classic 52-card decks for games like poker, blackjack, and many modern board games.

The aspect ratio is about 5:7 (width:height), which is why they feel nicely proportioned in your hand and are easy to shuffle.

Other common variations

If you were wondering about alternatives, there are a few other popular formats:

  • Bridge cards: about 2.25 in × 3.5 in (slightly narrower but same height as poker cards).
  • “Standard” in some printers’ metric specs: often listed as 64 mm × 89 mm (functionally the same as 2.5 in × 3.5 in).
  • Large/oversized cards: around 89 mm × 146 mm, used for novelty or easy-to-read decks.

Handy reference (HTML table)

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Card type Size (inches) Size (mm) Notes
Standard playing card (poker) 2.5 × 3.5 ≈ 63.5 × 88.9 Most common deck size worldwide.
Bridge card 2.25 × 3.5 ≈ 57 × 88.9 Narrower, often used for trick-taking games.
Standard (metric listing) ≈ 2.52 × 3.50 64 × 89 Printer spec; effectively same as poker size.
Large playing card ≈ 3.5 × 5.75 89 × 146 Oversized, used for display or accessibility.

Extra design details (if you’re printing)

  • Typical bleed: about 2 mm (or 0.125 in) on each edge so artwork can be trimmed cleanly.
  • Common corner radius: around 3.5 mm for standard decks to prevent sharp corners and fraying.

If your question is just “what size are normal playing cards?”, the practical answer is: plan for 2.5″ × 3.5″ and you’ll match a typical poker deck.

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