Stair Stepped Domino Tray

This is a domino tray that holds three rows of “5 each” tiles.  I “stair stepped” the three rows to improve visibility of the two rear rows of tiles.

I made these at the request of a neighbor who was having a difficult time with game play using the tile trays she's collected over the years.  When I last played Mexican Train next door, I asked if she'd have an easier time with the tiles if I elevated the back rows for improved visibility and she said she thought it might help.

I sent over a prototype for her to test the other night and she was very pleased with it, so I'm publishing it.

This tray is significantly narrower than BrknArrw's tray, intentionally.  I was hoping to fit the tray on the most common 3D printer bed size, those of the Creality Ender 3 and the like.  This model will fit the Ender 3 bed so long as it's printed without a skirt.  The actual build size of the Ender 3 on its X and Y axis's is 220mm X 220mm.  By orienting the tray on the bed at a 45 degree angle, it's dimensions are 219.2mm X 219.2mm, so yes, a very tight fit.

I print these as oriented in the STL without supports, nor raft, nor brim, nor skirt.  I've thus far only printed this model in PETG on a PEI build plate and have yet to have one fail.  It should be easily printable in any rigid material so long as there is good bed adhesion since this model has such a broad footprint.

UPDATE 09252026:  I added a file "Domino_Tray_Band.stl" to simplify storage of these trays.  I stack two trays together to form a rectangle shape, then slide two of these bands on to both ends to hold the two trays together.  They can then be stacked neatly on a shelf alongside the Domino set.  I sized these bands to fit my trays that were printed with the fuzzy skin filter, so I'd recommend printing one band first to test fit your trays, then scale up or down as necessary before printing enough bands for however many trays you'd like to join.