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

3,258 entries

#1TOP SCORE

Tall Notch

Türkiye
448 / 500
#2

Rare Kernel

Germany
447 / 500
#3

Merry Meadow

Spain
444 / 500

The full lineup

A perfect eye scores 500.
October 5, 2026 Size It Up rankings. Equal scores share the same rank.
RankEntryCountryScore
01Tall NotchTürkiye448 / 500
02Rare KernelGermany447 / 500
03Merry MeadowSpain444 / 500
04Nimble MarmotTürkiye431 / 500
05Patient QuartzTürkiye424 / 500
06Curious OtterAustria418 / 500
07Gentle LeagueFrance416 / 500
08Lucky SpanUnited States413 / 500
09Curious KernelGermany409 / 500
10Quiet BirchSpain405 / 500
11Keen GaugeKazakhstan399 / 500
12Curious LanternTürkiye394 / 500
13Keen OtterUnited States393 / 500
14Precise FathomUnited States392 / 500
14Merry HeronIsrael392 / 500
16Crisp BirchNorth Macedonia389 / 500
17Swift SparrowUnited States388 / 500
18Calm MeadowUnited States383 / 500
18Tiny HeronIsrael383 / 500
20Golden QuartzUnited States382 / 500
21Soft PloverSpain381 / 500
21Merry PloverAustria381 / 500
23Still PloverTürkiye380 / 500
23Brave WillowTürkiye380 / 500
25Curious HarborUnited States379 / 500
25Brave FinchFrance379 / 500
25Quiet CloverSwitzerland379 / 500
25Swift OtterFrance379 / 500
29Haliunsor 🇲🇳Mongolia378 / 500
30Calm HeronUnited States377 / 500
31Quiet BadgerFrance376 / 500
32Patient CloverFrance374 / 500
33Quick MapleUnited States372 / 500
34Brave DatumUnited States370 / 500
35Nimble WillowUnited Kingdom369 / 500
35Nimble LanternMongolia369 / 500
37Curious FinchFrance367 / 500
37Modest HarborFrance367 / 500
39Crisp HarborRomania366 / 500
39Misty PebbleSpain366 / 500
39Precise FalconDenmark366 / 500
39Crisp CompassCanada366 / 500
43Lucky CloverAustralia363 / 500
43Misty NotchUkraine363 / 500
43Bold CompassGermany363 / 500
46Still CloverUnited States362 / 500
46Bright GaugeSpain362 / 500
48Quiet BirchAustria361 / 500
48Modest MapleMongolia361 / 500
48Soft NotchUnited States361 / 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.