In this launch, there were "3U", "2U" and "1U" sized CubeSats[1]. 1U CubeSat is a 10x10x10 cm3 cube[2], "2U" is 20x10x10 cuboid and "3U" is 30x10x10 cuboid. [1

In this launch, there were "3U", "2U" and "1U" sized CubeSats[1]. 1U CubeSat is a 10x10x10 cm3 cube[2], "2U" is 20x10x10 cuboid and "3U" is 30x10x10 cuboid. [1] https://news.ycombinator.com/item?id=13650114 https://news.ycombinator.com/item?id=13650114 [2] https://en.wikipedia.org/wiki/CubeSat https://en.wikipedia.org/wiki/CubeSat