4x4x9A half regular cuboid from Grégoire Pfennigs run of cuboids of 2012.
4x5x5The "biggest" cuboid in the range of N<=5.
4x5x6The (fully functional) logical next step after 1x2x3, 2x3x4 and 3x4x5
4x6x6A fully functional cuboid with half-regular dimensions.
4x6x8Also known as "Another Ultimate Shape Shifter". Another entry in the ever growing field of fully functional cuboids.
4x8x8A pillowed 4x8x8. Made by hand from a 8x8x8.
5x5x7Another cuboid with half-regular dimensions that would have been impossible without CAD.
5x5x7 (pillowed)A pillowed version of the 5x5x7. Made from a mass produced 7x7x7.
5x5x8Another cuboid which for a long time was not known to be missing.