National Mah Jongg Card 2025 Rules. You may purchase the card on their website, www.nationalmahjonggleague.org , or by mail by sending. When playing american mah jongg, players use a card issued by the national mah jongg league.
39 2024 card (standard size 5 1/8”x4”) You will need a 2025 mah jongg card, which you can purchase online.