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Six-Sided: Cuboid
3x3x4 Rectangular PrismTony Fisher custom 3x3x4. Build from a 4x4x4.
3x3x4 WindmillThe concept of the Windmill Cube applied to a mass produced 3x3x4.
3x3x5 (Extended)A custom built 3x3x3 variation that functions as a 3x3x3.

3x3x5 (truncation only)3x3x5 cuboid made from a 5x5x5 cube
3x3x5 CircleA piece shuffle between 3x3x4 Circle and 3x3x6.
3x3x5 Fisher StarA 3x3x5 in shape of a Star Cube.

3x3x5 IIVersion from a 5x5x5.
3x3x5 PillA proportional 3x3x5 modified into the shape of a pill.
3x3x5 Super CuboidA Crazy 3x3x3 with two circles replaced with additional layers.

3x3x6The first custom made fully functional 3x3x6.
3x3x6 (rectangular pieces)A built-up of the 3x3x4 (Circle) of the same inventor and producer.
3x3x7The first 3x3x7 cuboid.

3x3x8A handmade 3x3x8.
3x3x9A fully functional 3x3x9 cuboid.
3x4x4One of the earlier cuboids. Started as one of Tony Fisher's custom puzzle.

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