Use

Design a bespoke piece

Sketch a piece sized to the exact space; export STL for a maker.

When nothing off-the-shelf fits, sketch it yourself at the exact dimensions of the space. Extrude a bookcase to fit an awkward alcove. Draw a bench sized to a narrow entryway. Sketch a cabinet fitted to a sloped ceiling. Export STL to a local carpenter, CNC shop, 3D-printing service, or laser-cutter.