Nordic style shoe rack designed in FreeCAD, using 9x19 or 10x20 wooden slats. You will need about 8 linear meters of slats and 2.5 x 10 wooden screws. You can customize it to your liking and add the floors you want.
Mine is 90 cm high and 25x25.

To do it the same, you need:

4 top corner
12 corners
4 legs
3 middle
4 slats of 90 cm
19 slats of 22.5 mm
50 screws 2.5 x10.