This is a post topper designed to fit a 4x4 post that you would buy at the lumber yard. I have given the option to print separately or together as one piece. I suggest separate. Then there is no need for supports. Just quickly and easily glue the two pieces together with super glue or Gloop. The picture is of it sanded and painted.

Updated.. I uploaded the top piece with a thicker bottom ledge that will reduce warping in the heat and sun.