Size It Up
Size It Up is a free size guessing game. Compare an animal or object with a known reference, estimate its height, and reveal the sourced answer in five daily rounds.
How to Play
Compare
Look at a known reference and the object whose height you are guessing.
Adjust
Move the slider or use the minus and plus buttons to set your estimate.
Reveal
Lock in your answer, see the measured value, and check its source.
Why size is hard to judge
A picture hides the scale of what it shows. A familiar reference helps, but the measurement point matters too: shoulder height, total height, and the height of a sports fixture are different things.
Each puzzle labels its measured dimension. Our source records explain the chosen value and when it was checked.
Quick answers
Is Size It Up free?
Yes. All three game modes in this version are free to play in a browser.
When does a new daily set appear?
A new five-round set appears at midnight in your local time zone.
Can I play after the daily five?
Yes. Unlimited practice and animal sets are available any time.
Does it work on a phone?
Yes. Use the slider and large step buttons on a touch screen.