size it up.

A little perspective

Detective

Each day, four objects share one scale. The marked reference is correct. Find the one incorrectly sized object among the other three in up to three guesses. Wrong guesses are ruled out. Finding it on guess 1, 2 or 3 earns 40, 25 or 10 points. Then resize it once for up to 60 more. A new scene opens at 00:00 UTC.

Read the full rules and scoring guide
Practice · not ranked
All past challenges

Daily scale mystery

Scale Detective

Past challenge. Scores do not count toward leaderboards or today’s progress.

2026-10-071 · Find it

Find the odd one out

The reference is correct. Exactly one of the other three has changed.

Guesses left: 3
Compare lengthsOne shared scale

Find it on guess 1 / 2 / 3: 40 / 25 / 10 points. Then repair its size for up to 60 more. One final correction.

All past challenges
View answers and sources

Answers from this past challenge. Today’s challenge remains a surprise.

The changed object: Tower Bridge

The correct adjustment: 1.6× the original shown size.

Sydney Opera House
ReferenceSydney Opera House183 m long

The published specification gives Sydney Opera House an overall length of 183 metres. This comparison measures the whole building and its podium along the long axis.

Source
Space station
Compared objectSpace station109 m long (end to end)

The International Space Station is 356 feet (109 metres) end to end. This silhouette spans that length.

Source
Tower Bridge
Compared objectTower Bridge244 m long

The published specification gives Tower Bridge an overall length of 244 metres. This comparison measures the entire bridge from abutment to abutment, including both side spans.

Source
HMS Belfast
Compared objectHMS Belfast187 m long

The published specification gives HMS Belfast an overall length of 187 metres. This comparison measures the complete ship from bow to stern, not just its waterline.

Source

Illustrations shown individually, not to a shared scale.

All past challengesPlay today’s challenge