The smallest scale three dimensional map is a representation of the 2df survey of galaxies in a glass cube. It has a scale of 1cm=1 billion light years (around one to one billion billion billion) and is produced by Crystal Nebulae (UK).
All of the approximately 200,000 galaxies mapped in the 2df survey arel represented within the cube. The galaxies are etched inside the cube by a laser, with a positional accuracy of 40 microns. This corresponds to a spatial uncertainty less than the results of the survey itself.