Official sizes and heights

Scale in Transformers is inconsistent to put it mildly. There are times however outside and inside of lore when official heights and sizes of characters are given. Here is a list of said sizes.

Marvel comics:

 * Shockwave (bio, gun mode length): >35'Shockwavespacegun.jpg
 * Thunderwing (Pretender shell): 40'
 * Dreadwind: 42'
 * Superion: 86' 7 3/8" (8 stories)
 * Metroplex (UK booklet): 698'
 * Broadside (carrier mode length): 1,200'

The Transformers Cartoon scale charts:

 * Rumble: 2 m
 * Frenzy: 2 m
 * Ravage: 2 m
 * Laserbeak (wingspan): 2 m
 * Buzzsaw (wingspan): 2 m
 * Kickback: 2.5 m
 * Shrapnel: 2.5 m
 * Bombshell 2.5 m
 * Bumblebee: >3 m
 * Cliffjumper: >3 m
 * Windcharger: 3 m
 * Gears: 3 m
 * Huffer: 3.5 m
 * Brawn: 3.5 m
 * Reflector: 4 m
 * Mirage: 4 m
 * Wheeljack: 4 m
 * Smokescreen: 4 m
 * Bluestreak: 4 m
 * Prowl: 4 m
 * Jazz: 4 m
 * Red Alert: 4 m
 * Sideswipe: 4 m
 * Sunstreaker: 4 m
 * Hoist: 5 m
 * Grapple: 5 m
 * Inferno: 5 m
 * Ratchet: 5 m
 * Ironhide: 5 m
 * Trailbreaker: 5 m
 * Perceptor: 5 m
 * Skywarp: 5 m
 * Thundercracker: 5 m
 * Starscream: 5 m
 * Soundwave: 5.5 m
 * Shockwave: 5.5 m
 * Blaster: 5.5 m
 * Ramjet: 5.5 m
 * Dirge: 5.5 m
 * Thrust: 5.5 m
 * Blitzwing: 5.5 m
 * Astrotrain: 5.5 m
 * Optimus Prime: 6 m
 * Megatron: 6 m
 * Snarl: 7 m
 * Slag: 7 m
 * Sludge: 7 m
 * Grimlock: 7 m
 * Devastator: ~16 m
 * Omega Supreme: ~18 m

Hobby Japan:

 * Metroplex: 800 m
 * Unicron: Jupiter-sized (so approximately 140,000 km in diameter)

Super Robots Guide:

 * Fortress Maximus: 3 km

Transformers: The Headmasters scale charts:

 * Shouki: 5 m
 * Razorclaw: 5.5 m
 * Mindwipe: 5.5 m
 * Highbrow: 5.5 m
 * Springer: 6 m
 * Weirdwolf: 6 m
 * Skullcruncher: 6 m
 * Hardhead: 6 m
 * Cerebros: 6 m
 * Brainstorm: 6 m
 * Ultra Magnus: ~7 m
 * Cyclonus: 7 m
 * Sixshot: 7 m
 * Raiden: ~16 m
 * Predaking: 16 m

Dreamwave Generation One continuity:

 * The Nemesis
 * Length: 2.5 miles
 * Wingspan: 1.75 miles
 * Height: 1.25 miles

2005 IDW continuity

 * Aileron: 22'
 * Centurion: 26'
 * Kup: 30'
 * Blitzwing: 30'
 * Arcee: 33'
 * Windblade: 33'
 * Victorion: ~150'
 * Metrotitan: 2 miles
 * Lost Light:
 * 15 miles long
 * 10 miles wide

Robots In Disguise Cartoon:

 * Skid-Z: 3.7 m
 * R.E.V.: 3.8 m
 * W.A.R.S.: 3.8 m
 * Crosswise: 3.8 m
 * Hot Shot: 3.8 m
 * Gaskunk: 4 m
 * Nightscream: 4 m
 * Slapper: 4 m
 * Movor: 4 m
 * Rollbar: 4 m
 * Armorhide: 4 m
 * Sideburn: 4 m
 * X-Brawn: 4.3 m
 * Ro-Tor: 4.6 m
 * Tow-Line: 4.8 m
 * Sky-Byte: 4.8 m
 * Mega-Octane: 7 m
 * Midnight Express: 9.2 m
 * Rapid Run: 9.7 m
 * Railspike: 10 m
 * Landfill: 12 m
 * Rail Racer: 15 m
 * Ruination: 16 m
 * Brave Maximus 350 m

Galaxy Force DVD booklets:

 * Crumplezone: 5.5 m

Scale chart for first film:

 * Barricade: 16'
 * Blackout: 33'

Revenge of the Fallen concept art:

 * Depthcharge: 150'