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Six-Sided: Cuboid
Not-So-Square-1Could also be named "Bump Square-1"
One Layer Square-1The one layered cousin of the three-, four- and two-layered variants. Made from a puck.
One Plane extended CubeA Rubiks Cube extended in one dimension.

One Plane truncated CubeA Rubiks Cube truncated in one dimension.
OrchidA puzzle with multiple origins, nineteen different moves in three different sets.
Overlapping 3x3x5A 3x3x4 (which is based on a 3x3x5) is modified like the Overlapping 4x4x4 was made out of a mass produced 4x4x4.

Overlapping CuboidThe concept of the Overlapping Cube applied to 2x4x4.
Overlapping FloppyA Floppy Cube modified to resemble the Overlapping Cube.
Ozonic 1x2x3A 1x2x3 "reduced to the max".

Pancake cubeA 3x3x4 was transformed by removing some pieces and exposing some others.
Phantom CubeA fully functional 3x3x4 by Katsuhiko Okamoto.
Phantom Mirror blockThe concept of the Mirror Blocks applied to a 3x3x4.

Professor Mental FlopThe fourth mental flop, built up from a 3x3x5.
QuartetA four-sided puzzle comparable to the Grimace.
Rubik's 4x3 CubeThe Rubik's 4x3 CubeĀ® is the incredibly addictive cousin of the Rubik's 5x3 CubeĀ®. From the Duane Cash Cube Collection.

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Rubik's Void

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