SizeGuess
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20 objects · Free category practice

Dinosaur size guessing game

Put the prehistoric world into perspective. Compare fossil-based body length estimates, from small feathered dinosaurs to long-necked sauropods. These are reconstructions, not measurements of living animals.

The world is waiting.

Preparing your size challenge…

Explore the dinosaurs collection

Each five-round set is generated from this collection. Your category scores are separate from the mixed daily streak. Read the chosen dimension and measurement note after each reveal.

Browse all 20 measurementsRead the source conventionsPlay today’s mixed challenge
dinosaurs

Tyrannosaurus rex

12 mlength

Museum body length estimate of 12 m; larger specimens exist.

See the perspective
dinosaurs

Triceratops

9 mlength

Museum estimate of total body length, nose to tail.

See the perspective
dinosaurs

Diplodocus

26 mlength

Museum estimate of total body length, including neck and tail.

See the perspective
dinosaurs

Brachiosaurus

22 mlength

Museum estimate of total length, not standing height.

Get a sense of scale.

  1. Find your reference.The forest-green shape has a known measurement. Check the height, length or diameter label.
  2. Resize your guess.Use the slider, the − / + buttons, or drag sideways on the board. Arrow keys adjust the slider.
  3. Lock it in.The teal outline reveals the recorded true size. Earn up to 100 points per round; five rounds make 500.
Full rules & scoring

Your perspective.

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