The table is 275mm in diameter and the side wall is 25mm tall to accommodate the 608 bearings that support the top plate. It ends up being able to support a considerable weight. I put a 12 lb (5.5 kg) cat on it and it rotated freely until she decided she didn't like rotating one bit and ran away.

I intend to motorize this, at some point.

It is sized to print on my CR10 (300mmx300mm), but it should be scalable to print it smaller as long as you don't scale the Z axis on the table and the base, and don't scale the Bearing Base and Bearing Shafts at all. (I have not yet tried to print a scaled model, so take that as you will).

I used the “Add Part” option in Prusa Slicer to add the Bearing Bases to the Base and printed them as one piece. They could also be printed separately and glued on.

The friction seems to hold the two bearing shaft pieces together, but they could be glued if necessary.