The heroes:
Godzilla - 125 meters (height), 200 meters (length);
Gamera - 100 meters (height), 150 meters (length);
Mothra - 70 meters (length), 160 meters (wingspan);
Rodan - 50 meters (height), 120 meters (wingspan);
Anguirus - 60 meters (height [quadrupedal]), 240 meters (length);
Baragon - 61 meters (height [bipedal]), 100 meters (length);
Mothra Larva - 100 meters (length);
Little Godzilla - 20 meters (height), 32 meters (length);
Manda - 360 meters (length);
Jet Jaguar - 120 meters (height);
Zilla - 70 meters (height), 150 meters (length);
Gezora - 90 meters (height);
King Caeser - 125 meters (height);
Varan - 120 meters (height [bipedal]), 200 meters (length);
Gorosaurus - 125 meters (height), 200 meters (length);
Titanosaurus - 150 meters (height), 220 meters (length);
Kumonga - 50 meters (legs height), 100 meters (length);
Barugon - 60 meters (height), 250 meters (length);
Kamoebas - 30 meters (height), 60 meters (length);
Yonggary - 150 meters (height), 225 meters (length);
Robomusume - 102 meters (height).
The villains:
King Ghidorah - 187.5 meters (height), 400 meters (wingspan);
Iris - 112 meters (height);
SpaceGodzilla - 150 meters (height), 240 meters (length);
Megalon - 137.5 meters (height);
Trilopod Beta - 155 meters (height), 310 meters (length);
Destoroyah - 150 meters (height), 255 meters (wingspan), 285 meters (length);
Biollante - 160 meters (height);
Dogora - 450 meters (length);
Gigan - 150 meters (height), 320 meters (length);
La Carcagne - 50 meters (height), 120 meters (wingspan);
Clover - 106 meters (height);
Reptilicus - 75 meters (length), 20 meters (wingspan);
Jiger - 70 meters (height), 120 meters (length);
Obsidius - 115 meters (height), 200 meters (length);
Orga - 150 meters (height), 187.5 meters (length);
Female MUTO - 110 meters (height);
Dagahra - 150 meters (length), 75 meters (wingspan);
Megaguirus - 117.5 meters (length), 200 meters (wingspan);
Mother Legion - 180 meters (height), 208 meters (length);
Cykor - 75 meters (height), 150 meters (length);
Glacies - 98 meters (height), 147 meters (length);
Shinomura - 300 meters (length), 200 meters (wingspan);
Hedorah - 150 meters (height), 225 meters (length);
Ebirah - 60 meters (height), 150 meters (length);
Onibaba - 100 meters (height);
Otachi - 75 meters (height), 150 meters (length);
Kamacuras - 60 meters (height), 135 meters (length), 100 meters (wingspan);
The Visitor - 120 meters (height), 170 meters (length), 70 meters (limbs length);
Guiron - 60 meters (height [at shoulders]), 120 meters (length).
The neutral monsters:
Kiryu - 125 meters (height), 250 meters (length);
Behemoth - 96 meters (height);
Methuselah - 150 meters (height), 300 meters (length);
Scylla - 75 meters (legs height);
Maguma - 120 meters (length);
King Kong - 96 meters (height);
King Cobra - 360 meters (length);
Crustaceous Rex - 60 meters (height), 75 meters (length);
Quetzalcoatl - 100 meters (height), 70 meters (wingspan), 180 meters (length);
Giant Bat - 50 meters (height), 150 meters (wingspan).