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.

Generation 1

Marvel comics:

• Bumblebee: 15'
• Shockwave (bio, gun mode length): 35'< ("more than 35 feet")
• Thunderwing (Pretender shell): 40'
• Dreadwind: 42'
• Devastator
  • Bio: 60'< ("over 60 feet")
  • UK booklet: 100'
• Predaking: 80'
• Superion: 86'7 3/8" (8 stories)
• Metroplex (UK booklet): 698'
• Broadside (carrier mode length): 1,200'

The Transformers Cartoon scale charts:

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

Hobby Japan:

• Metroplex: 800 meters
• Unicron: Jupiter-sized (so approximately 140,000 kilometers)

Super Robots Guide:

• Fortress Maximus: 3 kilometers

Transformers: The Headmasters scale charts:

• Shouki: 5 meters
• Razorclaw: 5.5 meters
• Mindwipe: 5.5 meters
• Zarak: ~5.5 meters
• Highbrow: 5.5 meters
• Springer: 6 meters
• Weirdwolf: 6 meters
• Skullcruncher: 6 meters
• Optimus Prime: 6 meters
• Rodimus Prime: 6 meters
• Hardhead: 6 meters
• Cerebros: 6 meters
• Brainstorm: 6 meters
• Galvatron: 6 meters
• Ultra Magnus: ~7 meters
• Grimlock: 7 meters
• Cyclonus: 7 meters
• Sixshot: 7 meters
• Devastator: ~16 meters
• Raiden: ~16 meters
• Predaking: 16 meters

Masterforce scale notes:

• Ginrai: 8 meters
• Super Ginrai: 15 meters

Kodansha properties:

• Shūta Gō: 7 meters (Kodansha guidebooks)
• Cab: 7 meters (Kodansha guidebooks)
• Minerva: 7 meters (Kodansha guidebooks)
• Wilder: 7 meters (Kodansha guidebooks)
• Bullhorn: 7 meters (Kodansha guidebooks)
• Cancer: 7 meters (Kodansha guidebooks)
• Battle Convoy: 13 meters (Terebi Magazine)
• King Poseidon: 20 meters (Terebi Magazine)
• Guard City: 60 meters (Terebi Magazine)
• Battle Gaia: 65 meters (Terebi Magazine)
• Metroplex: 800 meters (Comic Bom Bom)

Masterpiece bios and booklets:

• Optimus Prime: 36 meters
• Starscream (ghost version): 10 meters< ("well over 10 meters tall")

Transformers x Evangelion:

• Optimus Prime Mode Eva: 75 meters

Beast Wars cartoon bible:

• Rattrap: 5'

Japanese Beast Wars data:

• Rattrap: 1.8 meters
• Rattrap (Transmetal): 1.8 meters
• Airazor: 1.8 meters
• Quickstrike: 2 meters
• Ravage: 2.1 meters
• Cheetor: 2.3 meters
• Cheetor (Transmetal): 2.3 meters
• Tigatron: 2.3 meters
• Terrorsaur: 2.3 meters
• Blackarachnia: 2.4 meters
• Tarantulas: 2.4 meters
• Tarantulas (Transmetal): 2.5 meters
• Scorponok: 2.5 meters
• Waspinator: 2.5 meters
• Rhinox: 2.6 meters
• Inferno: 2.6 meters
• Silverbolt: 2.6 meters
• Black Arachnia (Transmetal 2): 2.6 meters
• Cheetor (Transmetal 2): 2.7 meters
• Optimus Primal: 2.8 meters
• Megatron: 2.8 meters
• Dinobot : 2.9 meters
• Dinobot II: 3.1 meters
• Optimus Primal (Transmetal): 3.2 meters
• Megatron (Transmetal): 3.2 meters
• Depthcharge: 3.4 meters
• Rampage: 3.4 meters
• Tigerhawk: 7 meters
• Megatron (Transmetal 2): 11.5 meters
• Optimal Optimus: 12 meters

Beast Wars Transmetals game:

• Rattrap (Transmetal): 180 cm
• Quickstrike: 200 cm
• Cheetor (Transmetal): 230 cm
• Tarantulas (Transmetal): 250 cm
• Silverbolt: 260 cm
• Optimus Primal (Transmetal): 300 cm
• Megatron (Transmetal): 320 cm
• Rampage (Transmetal): 340 cm

Beast Wars II data:

• Drillnuts: 2.0 meters
• Star Upper: 2.0 meters
• Scissorboy: 2.1 meters
• Lio Junior: 2.2 meters
• DJ: 2.5 meters
• Scuba: 2.7 meters
• Apache: 2.9 meters
• Lio Convoy: 3.0 meters
• Tasmania Kid: 2.3 meters
• Coelagon: 2.4 meters
• Terrormandar: 2.5 meters
• Tonbot: 2.5 meters
• Starscream: 2.5 meters
• Dirge: 2.5 meters
• Thrust: 2.6 meters
• Autolauncher: 2.6 meters
• Autocrusher: 2.7 meters
• Ikard: 2.7 meters
• Diver: 2.7 meters
• Big Mos: 2.7 meters
• Autojetter: 2.7 meters
• Scylla: 2.7 meters
• Sea Phantom: 2.8 meters
• Autostinger: 2.8 meters
• Thrustor: 2.8 meters
• Mantis: 2.8 meters
• Dirgegun: 2.8 meters
• Skywarp: 2.8 meters
• Hellscream: 2.8 meters
• Motorarm: 3.0 meters
• Powerhug: 3.2 meters
• Max B: 3.2 meters
• Bighorn: 3.5 meters
• Santon: 3.5 meters
• Gimlet: 3.5 meters
• Halfshell: 4.0 meters
• Megastorm: 4.0 meters
• BB: 4.0 meters
• Galvatron: 5.0 meters
• Magnaboss: 5.5 meters
• Tripledacus: 5.5 meters
• God Neptune: 5.7 meters
• Tako Tank/Sumi Icar: 5.8 meters
• Gigastorm: 15 meters
• Majin Zarak: 200 meters

Beast Wars Neo data:

• Stampy: 2.6 meters
• Heinrad: 2.6 meters
• Bump: 2.7 meters
• Hydra: 2.7 meters
• Colada: 2.75 meters
• Break: 2.8 meters
• Crazybolt: 2.8 meters
• Randy: 2.8 meters
• Saberback: 2.9 meters
• Longrack: 2.9 meters
• Sling: 2.9 meters
• Hardhead: 2.9 meters
• Sharpedge: 3.0 meters
• Rockbuster: 3.0 meters
• Deadend: 3.0 meters
• Bazooka: 3.0 meters
• Killerpunch: 3.1 meters
• Archadis: 3.1 meters
• Mach Kick: 3.1 meters
• Survive: 3.1 meters
• Guiledart: 3.2 meters
• Big Convoy: 3.2 meters
• Elphaorpha: 3.8 meters
• Drancron: 3.9 meters
• Rartorata: 4.0 meters
• Magmatron: 4.5 meters

Dreamwave Generation One continuity:

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

IDW Generation 1 continuity

• Aileron: 22'
• Centurion: 26'
• Kup: 30'
• Blitzwing: 30'
• Jazz: 32'
• Soundwave: 32'
• Arcee: 33'
• Windblade: 33'
• Optimus Prime:
  • 38'
  • 60' (Transformers #51)
• Grimlock: 38'
• Megatron: 38'
• Victorion: approx. 150'
• Devastator: 400'
• Metrotitan: 2 miles
• Lost Light:
  • 15 miles long
  • 10 miles wide

Transformers: Robots in Disguise (2001 franchise)

Robots In Disguise Cartoon:

• Skid-Z: 3.7 meters
• Mirage: 3.7 meters
• R.E.V.: 3.8 meters
• W.A.R.S.: 3.8 meters
• Crosswise: 3.8 meters
• Hot Shot: 3.8 meters
• Gaskunk: 4 meters
• Nightscream: 4 meters
• Slapper: 4 meters
• Movor: 4 meters
• Rollbar: 4 meters
• Armorhide: 4 meters
• Sideburn: 4 meters
• Ironhide: 4.1 meters
• X-Brawn: 4.3 meters
• Ro-Tor: 4.6 meters
• Tow-Line: 4.8 meters
• Sky-Byte: 4.8 meters
• Scourge: 5 meters
• Optimus Prime: 5 meters
• Optimus Prime (Super Mode): 6.5 meters
• Mega-Octane: 7 meters
• Megatron: 7 meters
• Midnight Express: 9.2 meters
• Rapid Run: 9.7 meters
• Railspike: 10 meters
• Landfill: 12 meters
• Rail Racer: 15 meters
• Ruination: 16 meters
• Brave Maximus 350 meters

Unicron Trilogy

Transformers Video Game:

• Hot Shot: 16' 5"
• Cyclonus:
  • Vehicle: 17' 1"
  • Robot: 19' 7"
• Starscream:
  • Vehicle: 15' 1"
  • Robot 19' 7"
• Red Alert: 19' 8"
• Optimus Prime: 22' 11"
• Megatron:
  • Vehicle: 8' 3"
  • Robot: 22' 11"

Superlink Pla-Kit 1/45 models:

• Grand Convoy: 13'1½"
• Grand Scourge: 13'1½"
• Grand Convoy (Super Mode): 15'11¼"
• Grand Scourge (Super Mode): 15'11¼"

Galaxy Force DVD booklets:

• Soundwave: 4.1 meters
• Crumplezone: 5.5 meters

Live-action film series

Preliminary scale chart for first film:

• Arcee: 9'
• Jazz: 14'
• Bumblebee: 18'
• Ratchet: 24'
• Optimus Prime: 32'

Scale chart for first film:

• Frenzy: 3'
• Jazz: 15'
• Bumblebee: 16'
• Barricade: 16'
• Ratchet: 20'
• Ironhide: 22'
• Optimus Prime: 28'
• Starscream: 31'
• Blackout: 33'
• Megatron: 35'

Transformers film trading cards:

• Optimus Prime: 28'

Transformers The Game:

• Bumblebee: 16'

Revenge of the Fallen concept art:

• Depthcharge: 150'

Revenge of the Fallen film scale charts:

• Frenzy: 3'
• Arcee 1: 7'
• Arcee 2: 7'
• Arcee 3: 7'
• Mudflap: 8'
• Skids: 8'
• Arcee (combined): 15'
• Sideswipe: 15'
• Bumblebee: 16'
• Barricade: 16'
• Ratchet: 20'
• Ironhide: 22'
• Soundwave: 22'
• Cement Mixer: 22'
• Optimus Prime: 28'
• Osprey: 30'
• Starscream: 31'
• Blackout: 33'
• Megatron: 35'
• Rampage: 35'
• Optimus Prime (Power Up): 40'
• Jetfire: 50'
• Long Haul: 65'
• Scavenger: 75'
• Devastator: 100'

Transformers: Revenge of the Fallen: The Movie Universe:

• Ravage:
  • Height: 7'2"
  • Length: 15'
• Skids: 11'4"
• Mudflap: 11'4"
• Bumblebee: 16'2"
• Blackout: 22'5"
• Ironhide: 25'
• Optimus Prime: 28'
• Starscream: 31'
• The Fallen: 42'
• Devastator: (on all fours) 46'

Revenge of the Fallen sticker sheets:

• Megatron: 35'

Michael Bay's Revenge of the Fallen blog:

• Devastator: ~108'3 7/32" ("10 stories")

Transformers: The Last Knight Twitter page

• Sqweeks: 3'6"
• Barricade: 16'0"
• Drift: 16'0"
• Hot Rod: 16'1"
• Bumblebee: 18'0"
• Crosshairs: 18'0"
• Hound: 24'0"
• Megatron: 30'0"

Aligned continuity family

Transformers: Fall of Cybertron:

• Bumblebee: 20'
• Optimus Prime: ~30'
• Megatron: ~30'
• Grimlock: 40'
• Bruticus: 70'
• Metroplex: 600'

Transformers: Retribution game

• Omega Supreme: 1/2 mile

Transformers: Prime cartoon:

• Predaking (wingspan): ~220 meters ("two football fields")