size it up.

A little perspective

Trust your eye.

Five comparisons. Two objects each time. How close can you get?

  1. Compare

    The object on the left is your measuring stick. Keep resizing — the view automatically zooms out when you need more room. You can also zoom the canvas; both objects scale together without changing your estimate.

  2. Find the right size

    Drag the blue handle, scroll while hovering it, tap − / +, or use the arrow keys. Match the dimension in the question.

  3. Lock it in

    Reveal the real size and earn up to 100 points. Five rounds add up to a maximum of 500.

The first answer in each round counts. A new challenge arrives every day at 00:00 UTC. Object sizes use the specific examples shown in the answer.

Read the full rules and scoring guideLet’s play

THE LEADERBOARD

See how you
measure up.

Good eyes. Small margins. A little friendly competition.

5rounds500possible points
Make your mark

A fresh challenge at 00:00 UTC

CHOOSE A DATE
October 2026
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Daily challenges follow UTC.Go to today
Back to today

The day’s best eyesFinal

1,241 entries

#1TOP SCORE

Keen Clover

Germany
447 / 500
#2

Precise Willow

Spain
436 / 500
#3

Crisp Datum

Australia
418 / 500

The full lineup

A perfect eye scores 500.
October 10, 2026 Size It Up rankings. Equal scores share the same rank.
RankEntryCountryScore
01Keen CloverGermany447 / 500
02Precise WillowSpain436 / 500
03Crisp DatumAustralia418 / 500
04Wild FathomItaly396 / 500
05Gentle ThistleMongolia378 / 500
06Bright LeagueGermany374 / 500
07Keen PloverSpain370 / 500
07Gentle NotchSpain370 / 500
09Silver QuartzGermany368 / 500
10Swift NotchSweden363 / 500
10Lucky QuartzGermany363 / 500
12Quick FathomSpain362 / 500
13Keen HeronSpain361 / 500
13Soft FalconBelarus361 / 500
15Patient LeagueSpain360 / 500
16Modest MarmotUnited Kingdom356 / 500
17Lucky SpanGermany354 / 500
17Calm SparrowSpain354 / 500
19Quiet LanternSpain353 / 500
20Steady LanternGermany352 / 500
21Bold HeronChina351 / 500
21Modest GaugeSpain351 / 500
21Wild MarmotCanada351 / 500
24Sunny GaugeSpain349 / 500
24Brave OtterRussia349 / 500
26Sunny WillowFrance347 / 500
27Gentle QuartzChina345 / 500
28Bold FathomUnited Kingdom344 / 500
28Modest KernelSpain344 / 500
28Lucky FinchCanada344 / 500
31Gentle HeronGermany341 / 500
32Rare CedarSpain340 / 500
33Tall LeagueUnited States339 / 500
33Quiet PloverSpain339 / 500
35Merry SparrowUnited Kingdom338 / 500
35Soft MapleGermany338 / 500
37Golden OtterTürkiye336 / 500
37Amber PlumbGermany336 / 500
39Bold HarborFrance332 / 500
40Quick PlumbTürkiye331 / 500
41Tall PloverFrance330 / 500
42Quick PloverGermany329 / 500
42Tall CompassFrance329 / 500
44Precise HeronFrance328 / 500
45Amber GaugeGermany327 / 500
45Merry SpanItaly327 / 500
47Golden FinchFrance326 / 500
48Gentle PloverFrance325 / 500
48Sunny MarmotSpain325 / 500
50Golden CubitSpain324 / 500

Showing the top 50 entries.

This day is closed. Play today

Five rounds. 500 possible points. Equal scores share a rank.

How the leaderboard works

Your first completed challenge counts. Completed daily challenges automatically join the leaderboard with your current nickname; no sign-in is needed. You can edit your nickname, avatar, and country or region from your profile. Your connection may supply an initial country or region for the flag. Your email is never shown. Daily challenges close at 00:00 UTC. Earlier leaderboards remain available, but no longer accept scores. Monthly rankings follow the UTC calendar month.