Small bookshelf pieces that fit on the bed of small/medium-sized printers (100mmX175mm).
Each piece fits onto another, allowing you to make it as tall as you want. A small foot piece is also included for added stability.
Print the model laying down (picture 2) and use supports touching buildplate only to support the interlocking piece. Alternatively, you could print with the flat part down and you might not need supports inside the channels.
The author hasn't provided the model origin yet.