Measures 265mm x 265mm. Fits all components perfectly (with some room to spare). Tray allows for the colors to remain separate yet easy to grab.
You can print the organizer with some pretty sparse infill. But a little bit extra for the tray since it's handled more.
The two desk version (for the French expansion) is available here: https://www.printables.com/model/166942-concept-board-game-organizer-dual-cards
The author hasn't provided the model origin yet.