A Rubik's Cube has 3 pieces wide, so it is called 3x3 Rubik's Cube. The Rubik's Cube record is only 5.55 seconds. There are other well-known cubes with more pieces per side as 4x4 and 5x5 cubes. The number of parts and the number of moves needed to solve them increase, also increasing the number of seconds required to solve them (22 and 48 seconds, respectively).
A few years ago they managed to create the first 6x6 and 7x7 Rubik's cubes. And some time later they became official categories in Rubik's Cube competitions. Their records are 1:40 and 2:38, respectively.
All these cubes are small, even tiny, compared with 17x17 Rubik's Cube, the most complicated Rubik's cube in the world. With 1734 stickers, it is not easy to solve. However, Kenneth Brandon has been able to solve it in 7 and a half hours!!
You can watch the full video (nearly eight hours duration).