The file 'Simple Wall Letter Holder / Organizer (OpenSCAD) 3D Printer Model' is (scad,stl) file type, size is 12.4KB.
Wall Letter Organiser using commands strips split in half to stick it to the wall
You need two copies to hold each letter stably
This was tested under a Prusa MK3S+ with a 0.6mm Nozzle