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

4,581 entries

#1TOP SCORE

Sikima21

Serbia
452 / 500
Joint #2

Golden Marmot

Denmark
446 / 500
Joint #2

Bold Compass

Netherlands
446 / 500

The full lineup

A perfect eye scores 500.
October 2, 2026 Size It Up rankings. Equal scores share the same rank.
RankEntryCountryScore
01Sikima21Serbia452 / 500
02Golden MarmotDenmark446 / 500
02Bold CompassNetherlands446 / 500
04Gentle SparrowLatvia445 / 500
05Golden CedarTürkiye442 / 500
06Modest FathomGermany434 / 500
07Still PloverLuxembourg431 / 500
08Crisp DatumAustralia425 / 500
09Tiny WillowGermany419 / 500
10Silver DatumFrance417 / 500
10Amber KernelFrance417 / 500
12Bold PebbleUnited States416 / 500
13Steady QuartzIndia413 / 500
14Golden FalconCzechia411 / 500
15Warm PloverUnited States409 / 500
16Warm GaugeGermany407 / 500
17Curious PlumbGermany405 / 500
18Silver MapleTürkiye402 / 500
19Misty NotchDenmark400 / 500
20Nimble GaugeCzechia397 / 500
20Wild QuartzGermany397 / 500
20Calm CedarFrance397 / 500
23Keen KernelSpain396 / 500
24Tall HeronSwitzerland395 / 500
24Precise SparrowGermany395 / 500
24Rare HarborSaudi Arabia395 / 500
24Quick HeronGermany395 / 500
24Silver CubitFrance395 / 500
24Lucky BadgerTürkiye395 / 500
30Bright LeagueIndia394 / 500
31Keen WillowSerbia393 / 500
32Gentle BadgerDenmark392 / 500
33Wild FinchUnited States391 / 500
34Wild CedarUruguay390 / 500
34Gentle NimbusSpain390 / 500
34Patient OtterGermany390 / 500
34Merry HeronUnited Kingdom390 / 500
38Bold SparrowGermany389 / 500
39Swift QuartzSwitzerland388 / 500
40Crisp BirchLuxembourg387 / 500
40Silver CompassGermany387 / 500
40Wild MeadowSwitzerland387 / 500
40Gentle GaugeThailand387 / 500
44Amber PebbleGermany386 / 500
45Tall MapleGermany385 / 500
46Patient CompassPoland384 / 500
47Lucky MarmotFrance383 / 500
47Lucky MapleCanada383 / 500
49Misty CedarSpain382 / 500
49Quick CloverGermany382 / 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.