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

2,585 entries

#1TOP SCORE

Crisp Datum

Australia
441 / 500
#2

Modest Nimbus

Brazil
412 / 500
#3

Modest Thistle

United States
396 / 500

The full lineup

A perfect eye scores 500.
October 7, 2026 Size It Up rankings. Equal scores share the same rank.
RankEntryCountryScore
01Crisp DatumAustralia441 / 500
02Modest NimbusBrazil412 / 500
03Modest ThistleUnited States396 / 500
04Calm LanternTaiwan395 / 500
04Keen NimbusTürkiye395 / 500
06Lucky HeronPoland393 / 500
07Curious FinchNetherlands389 / 500
08Precise HarborUkraine388 / 500
09Golden CloverSerbia387 / 500
10Crisp NimbusCzechia385 / 500
11Gentle CedarSpain380 / 500
12Silver HarborUnited States378 / 500
13Silver GaugeGermany377 / 500
13Wild DatumUnited States377 / 500
15Tiny SparrowIndia376 / 500
16Still LanternBosnia & Herzegovina375 / 500
17Precise FalconGermany374 / 500
18Rare NotchUnited States372 / 500
19Rare QuartzGermany370 / 500
20Soft FinchGermany369 / 500
21Nimble FinchUnited States368 / 500
22Tiny PebbleUnited States366 / 500
22Tiny CompassPoland366 / 500
24Tall LeagueNetherlands365 / 500
25Rare WillowUnited States364 / 500
26Silver CompassFrance362 / 500
26Warm CedarBrazil362 / 500
28Calm FathomNew Zealand361 / 500
28Quiet CompassGermany361 / 500
30Quick GaugeFrance360 / 500
30Crisp SpanBrazil360 / 500
32Nimble OtterFrance359 / 500
32Misty FinchGermany359 / 500
32Golden QuartzSwitzerland359 / 500
35Silver HarborAustria358 / 500
35Steady NimbusFrance358 / 500
35Keen FalconUnited States358 / 500
35Keen DatumHungary358 / 500
39Golden FinchTürkiye357 / 500
40Merry GaugeGermany356 / 500
41Quiet DatumMongolia355 / 500
41Still HeronBrazil355 / 500
41Keen PloverKazakhstan355 / 500
41Lucky NotchFrance355 / 500
45Quick MarmotGermany354 / 500
46Modest SparrowKazakhstan353 / 500
47Lucky DatumSpain352 / 500
47Bright MeadowTürkiye352 / 500
49Sunny MapleOman351 / 500
49Soft NotchMoldova351 / 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.