Rubik's cube 5.5cm 3x3 Rubik's cube 5.5cm 3x3 - the cube itself is a mechanical puzzle. In 1974, this cube was invented by the Hungarian sculptor and architecture professor Ernő Rubik. It consists of 26 small cubes rotating on a core that is not visible from the outside. Each of the nine visible walls on one of the six sides of the Rubik's Cube has one of 6 colors: green, orange, white, blue, yellow, and red. The main task of the game is to arrange the cube so that each of the six walls is one color. Dimensions: 5.5cm x 5.5cm