This is a smaller version of my scale chart of UNSC and Covenant ships-
I've removed all the larger capital ships to bring the smaller ones into focus.
Update 02- Three more from the Halo Cryptum book, the section depicting the Forerunner attack of a San 'Shyuum quarantine world, the planet's defence force described as several ships in varying sizes and design, the battle cruiser as their attempted equal to the forerunner warships, the smaller support ships(similar in function to UNSC Frigates) and an unusually designed transport seen attempting to flee the sieged planet with an anti gravity propulsion array resembling a jellyfish.
Update01- I've corrected the size of the Covenant Super cruiser from Fall of reach, also added the Forerunner Warship from Halo Wars and Origins I and the Didact's cruiser from Halo Cryptum
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