Oh My Mahjong announced its International Mahjong Card on November 6, 2025, adding an annual card to its teaching and product offerings. The company’s release advertised presales at $12 and highlighted a design intended to be accessible to color-blind players.

The announcement also pledged 15 percent of card sales to organizations supporting Alzheimer’s research, awareness and care, connecting the initiative to founder Megan Trottier’s grandmother. These accessibility and charitable-giving statements are claims from the company’s launch announcement.

This is an Oh My Mahjong card with its own playing guidance. It is separate from the National Mah Jongg League’s card, and its blank-tile rules should not be transferred into NMJL instruction.