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.

2026-10-101 · 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: WAGO 221 lever connector

The correct adjustment: 1.35× the original shown size.

CR2032 coin battery
ReferenceCR2032 coin battery2 cm across (maximum)

The Energizer CR2032 coin battery has a maximum diameter of 20 millimetres. This comparison measures its circular face, not its 3.2-millimetre maximum thickness.

Source
US quarter
Compared objectUS quarter2.426 cm across

A US quarter measures 24.26 mm across; the comparison uses its diameter, not its thickness.

Source
microSD card
Compared objectmicroSD card1.5 cm long

A microSD card measures 15 by 11 millimetres. This round compares its longer edge, with the card shown horizontally.

Source
WAGO 221 lever connector
Compared objectWAGO 221 lever connector1.83 cm long

Manufacturer specification for WAGO 221 lever connector: 18.3 mm; CAD nominal depth of the 221-412 connector with both levers closed.

Source

Illustrations shown individually, not to a shared scale.

All past challengesPlay today’s challenge