Poker dice in 15mm and one inch sizes with two forms, card face and letter/number. Card faces came from a PD SVG source (as memory serves). Best printed solid or near solid for throw weight. If not solid, choose an infill form with even mass distribution.
Photo is of examples printed on an Ender 3 & colored with marker ink. Card face version printed Ace down with no supports.
Source material on Tinkercad:
The author hasn't provided the model origin yet.