I remixed JamieLaing's great model of a hand to be used as a shelf.
To achieve that I removed the base, rotated the hand so that a plate or board can rest on the fingers and palms and put two hidden screw holes on the "back" of the hand.
You have to print the hand two times and flip it once to get both to hold the shelf.
Hand_Regal_2_2.stl |