This 3D printed frame helps arrange Mahjong tiles in the classic turtle formation (Mahjong Solitaire).

It has raised borders to keep the tiles in place and shallow step-like offsets (about 1 mm) recessed into the central areas, so the stacked tiles sit slightly lower and are easier to place without slipping.

The model is split into two parts so it can be printed on standard-size printers and then joined together.

Designed for tiles measuring 23.75 mm × 16.75 mm.