Until recently, it was customary to consider the MARU NANO cube to be the smallest cube of mass production, i.e. one that can be freely found on sale and purchased, the face size of this cube is 15 mm. But now there is already a 1.5 times smaller cube. This is a Cubelab cube and its size is only 10 millimeters. In other words, this is the smallest Rubik's cube of mass production, which I know and which can be taken and freely purchased, but so far only in China.
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