Ship comparison: (pixel:meters)

Trebuchet-class Battleship
Length: 26,150 m

Destiny-class Super Star Destroyer
Length: 20,000 m

Executor II-class Super Star Destroyer
Length: 19,000 m

Keeper Dreadnaught
Length: 18,000 m

Executor-class Super Star Destroyer
Length: 17,600 m

Supreme Battleship
Length: 13,810 m

Sovereign-class Battlecruiser
Length: 13,330 m

Dominance-class Battlecruiser
Length: 12,900 m

Kaiser-class Battlecruiser
Length: 12,900 m

Vengeance-class Battlecruiser
Length: 10,009 m

Achilles-class Battlecruiser
Length: 10,000 m

Diamond Battlestation
Diameter: 9,500 m

Jango-class Battlecruiser
Diameter: 8,350 m