12x12x12 (flat)The second 12x12x12 ever made and the first with flat surfaces.
12x12x12 (pillowed)The first working prototype to break the border (11x11x11) set by the Verdes patent.
13x13x13The puzzles title couldn't be more descriptive.
17x17x17Also known as "Over the top". A puzzle made just because it is possible.
22x22x22The highest order cube as of 2016.
7x9x9A pillowed version of the 7x9x9. Made from a 9x9x9.