Providing 5 big and 4 small spaces in the 3x3 configuration. In this design the arrangement is quite fixed but still can be individualised by the color choice. The pieces are connected via 3D printed dovetails which allow an invisible connection.

Parts to print: for the 3x3 configuration 1x center 2x corner 1x corner top right 1x corner top left 4x side 12x dovetail

If you have fitment issues there are looser dovetail connectors. Just use them where needed.

Size: The 3x3 configuration in total is 425 x 425 x 125mm The single cubes are 155x155x125mm

Print settings: center, corner, side 0.2mm layer height 2 walls 15% infill a brim can be helpful for print orientation see the last picture

dovetail 0.12mm layer height 3 walls 30% infill no brim

Filament: Choose a nice color combination :)