5x3x3 and 7x3x3 Rubik's Cubes
These puzzles are not really fully functional 5x3x3 and 7x3x3 puzzles because there are thinner outer layers. You can play with them without watching any tutorial to see how far you get without help. You have to know how to solve the Rubiks's Cube and a 3x3x4 Cube. You can use this puzzle just like a classic Rubik's Cube if you don't mess up the tiny pieces.
These Cube4You versions what you can see on the picture come in a DIY kit so you have to put them together and apply the stickers. They have very good quality, and you can choose between white and black bodies.
There are more complex versions of the 7x3x3 Cube, for example the Super 3x3x7 has a circle in the middle to make it more tricky, and the Full Function 3x3x7 II Cube has got thin pieces in the middle layer too.
The solution of a 3x3x7 Cubic Puzzle is like a 3x3x3 and a 3x3x4 Cube combined. As you can see on the picture, the inner thin layer has to be solved like a classic Rubik's Cube watching only the colors of the inner thiny pieces, then the outer layers behave like the outer pieces of the 3x3x4 Cube.
It's quite an interesting puzzle, it's worth buying one because it's a 3-in-1 Puzzle and has very good quality.