This is my entry for the 2014 SHIPtember edition.
Length: 126 studs (101cm)
The Common-class Modular Star Hauler vessels were designed as modular and easy low-cost to assemble ships able to transport a lot of different cargo across very long distances. Their modular conception allowed for virtually unlimited capacity as modules can be added or removed upon needs.
The Common-class Modular Star Hauler Blackbee is a nice example carrying 3 container sections and two power rings.