The Borg Hypercube was a four-dimensional class of starship employed by the Borg Collective in a possible future. As it was only ever encountered inside of a transwarp conduit, it is unclear whether it can exist in real space. (TNG - Alien Spotlight comic: "Borg")

Borg starship classes
	assembler • assimilator • collector • colony ship • command ship • cube • detector • diamond • fusion cube • harbinger • harmonic defender • hypercube • interceptor • obelisk • pyramid • rectangle • scout • sphere • tactical cube • tactical fusion cube • wedge • workbee