Proxima Class Battleship. The Proxima-class was a type of Federation starship in Starfleet service in the mid-23rd century. It is considered a battleship and it is heavily armed. At some point in time, it underwent a refit, adding updated nacelles, a weapons pod, as well as 2 additional forward torpedo launchers to the front of the saucer.
Borg cubes were massive in size, measuring over three kilometers across and possessing an internal volume of 28 cubic kilometers. (VOY: "Dark Frontier") In 2366, Commander Shelby estimated that a cube could remain functional even if 78% were rendered inoperable. (TNG: "The Best of Both Worlds")