I created this Tic Tac Toe box of 11cm by 11cm (4.33 inches x 4.33 inches). It is a box with the lines to play printed in the base. I used a color change on my Prusa MK3S so it looks prettier but you could use a single color. I also used the same color as the lines for the X´s and the O´s. I will add a rubber band around or something like that to keep it in place.
The idea came up by merging two concepts I came across:
https://www.tinkercad.com/things/0kVorVLnWeG-tic-tac-toe (which was going to take very long to print) and this other: https://www.tinkercad.com/things/l8zHGeMu90O-travel-tic-tac-toe (which internal measurements where all wrong and the top cover wouldnt fit).
Print settings I used:
0.20mm Speed
Prusament PLA
Infill: 20%
Brim, but probably you can print without it, I just like adding one to avoid any warping.
Top Print Time: 2h 7m.
Bottom Print Time: 2h 20m. (On my G Code I included a change of color so that it looks nicer and clearer when playing.
Just the Xs and Os Print Time: 1h 24 minutes.
If you feel like modifying the design feel free to do so: https://www.tinkercad.com/things/6YMt8tvkefK-tic-tac-toe-with-box-2020
The author hasn't provided the model origin yet.