This figure compares estimated body-mass values for prehistoric animals in kilograms.

• DinoAnimals provides the broadest mass coverage for dinosaurs, while Wikidata and Wikipedia rescue additional animals and bad overrides.
• The value is an estimate scale, not a weighed specimen on a museum floor.
• Tiny feathered animals and giant sauropods share the same slider, which is part of the fun.

Prehistoric mass is always an estimate, just with wildly different confidence levels.