When you hold it in your hands, this ZhanChi feels a little smaller than a typical 57mm 3x3, as it's only 2 mm smaller than the original. With this little tweak in size, this cube is easier to hold for people with smaller hands or used for one-handed solves, and it can be easily controlled by those who have large hands. The smooth speed, the cutting, and the feel is the same as the original sized ZhanChi. Plus, with this small difference, it's absolutely competition legal.