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.

2026-10-061 · 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: Casio HS-3V-1BR stopwatch

The correct adjustment: 0.63× the original shown size.

Beurer PO 30 pulse oximeter
ReferenceBeurer PO 30 pulse oximeter6.1 cm long

For Beurer PO 30 pulse oximeter, Beurer specifies 6.1 cm: overall body length, with the clamp closed and without a strap.

Source
Tweezerman Precision Grip nail clipper
Compared objectTweezerman Precision Grip nail clipper6.5 cm long

For Tweezerman Precision Grip nail clipper, the published measurement is 6.5 cm: the overall length of the Precision Grip fingernail clipper with its lever folded down.

Source
Casio HS-3V-1BR stopwatch
Compared objectCasio HS-3V-1BR stopwatch6.4 cm wide

For Casio HS-3V-1BR stopwatch, Casio specifies 6.4 cm: overall case width from left to right, excluding the neck strap.

Source
D battery
Compared objectD battery6.15 cm long (maximum)

The Energizer E95 D battery is at most 61.5 millimetres long, including its terminals. This comparison uses that maximum overall length.

Source

Illustrations shown individually, not to a shared scale.

All past challengesPlay today’s challenge