YJ have released Pocket cubes that are even cheaper than their previous ZhiLong series, ultimately the cubes seem very similar to the ZhiLong series, they are the same size and feel very similar, however, they are even cheaper, they come in a simple cardboard box with no accessories but they both turn well. The mini 3x3 comes in at 50mm which is about the size of most 2x2s, while the mini 4x4 comes in at 56mm which is about the size of most 3x3s.