Belongs to the family of circle cubes/crazy cubes with circles on just one axis. The upper/bottom layer of the puzzle turns freely around the inner nice circle pieces. The whole puzzle can be mixed up like a normal 3x3x3 except for these differences:
(1) The white/yellow center pieces are fixed on their axes, so turns around them are not possible (or just for one - final - twist). So it is a bandaged cube.
(2) As long as a circle is complete at the end of move, it is possible to mix up the outer and inner parts of the white and yellow layers.
Size: 5.7cm standard edge length