Raspberry Pi 4B case

Additional parts:

4x M2.5 10mm screw 

4x M2.5 nut

4x M3 20mm screw

4x M3 nut

these sizes were chosen because they are very likely to be found in your average hobby store, the case could be smaller, however, that would require 6-8mm M2.5 screws which are more difficult to find