This is a simple shoe rack you can easily build with standard 3/4inch square aluminum extrusion available in most hardware store. Simply cut to desired lengths, print parts and assemble.
You can put as many shelves as you want, just make sure everything is steady. Parts include a plug for the legs, to keep the floor in good shape.
I don't own a 3d printer myself so I could not print it, I suggest testing extrusion fit before printing the whole set.
The author hasn't provided the model origin yet.