Most of us do not carry exact measurements around in memory. We remember relationships: a blue whale feels like several buses, the Moon feels like a smaller Earth, and one tower feels roughly half of another. Size It Up turns those fuzzy anchors into something visible.
The score uses proportional error, so guessing twice too large is treated like guessing half too small. Number modes extend the same idea across powers of ten, making tiny and enormous answers fair to compare.
Each round compares one stated measurement: height, length, diameter, or span.
02
Set the proportion
Drag the target, move the scale control, or use the arrow keys until the relationship feels right.
03
Keep the anchor
Lock the estimate to reveal the true outline, score, dimensions, and one memorable fact.
Common questions
Before you size it up.
Is Size It Up free to play?
Yes. All five game modes and unlimited category practice are free in a modern browser, with no account or download required.
Does everyone get the same daily challenge?
Yes. Each five-round size game and the one-question Daily Estimate are generated from the UTC date, so players can compare results. Survival refreshes weekly.
What does the second silhouette after a guess mean?
The red silhouette preserves your estimate. The translucent green silhouette reveals the true proportional size along the round’s named measurement axis.
Are the object measurements exact?
Natural objects vary, and some landmarks can be measured in several ways. Each round names the axis, uses a representative or published dimension, and links its reference on the sources page.
Is this the official Magnitudle game?
No. Size It Up Daily is an independent visual estimation game with its own code, challenge library, interface, scoring, and practice modes. It is not endorsed by or affiliated with Magnitudle.
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With your permission, we use Google Analytics to understand which pages and game features are useful. The game works the same if you decline. Privacy details