SizeGuess
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8 objects · Free category practice

Nature size guessing game

Mountain elevations, tree heights and waterfalls challenge your sense of vertical scale. Summit elevation is measured above sea level, rather than from the foot of a mountain.

The world is waiting.

Preparing your size challenge…

Explore the nature 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 8 measurementsRead the source conventionsPlay today’s mixed challenge
nature

Denali

6.19 kmheight

Summit elevation above sea level, rounded to 6,190 m.

See the perspective
nature

Mount Fuji

3.78 kmheight

Published summit elevation above sea level.

See the perspective
nature

Kilimanjaro

5.9 kmheight

Uhuru Peak elevation above sea level.

See the perspective
nature

Mauna Loa

4.17 kmheight

Rounded summit elevation above sea level.

Get a sense of scale.

  1. Find your reference.The object on the left has a known measurement. Check the height, length or diameter label.
  2. Resize your guess.Pull the corner of the coral silhouette, use the slider, or tap − / +. The green reference stays fixed. Fit view changes only the camera.
  3. Lock it in.The teal silhouette animates to its true size; your coral guess stays visible for comparison. Earn up to 100 points per round; five rounds make 500.
Full rules & scoring

Your perspective.

Play a set to start your personal history.

Share a perspective.

Same silhouettes. Same rounds. Who has the better eye?

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