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

2,586 entries

#1TOP SCORE

Bright Cubit

Germany
442 / 500
#2

Calm Kernel

Kazakhstan
438 / 500
#3

Amber Plumb

Australia
437 / 500

The full lineup

A perfect eye scores 500.
October 3, 2026 Size It Up rankings. Equal scores share the same rank.
RankEntryCountryScore
01Bright CubitGermany442 / 500
02Calm KernelKazakhstan438 / 500
03Amber PlumbAustralia437 / 500
04Gentle BirchRussia435 / 500
05Tall PlumbTürkiye423 / 500
06Rare CompassUruguay422 / 500
07Rare BirchBelarus419 / 500
08Silver DatumPoland418 / 500
09Warm NotchUnited Kingdom416 / 500
10Amber FathomSingapore415 / 500
11Nimble MapleNew Zealand414 / 500
11Wild NimbusUkraine414 / 500
13Silver CedarKazakhstan410 / 500
13Calm ThistleUkraine410 / 500
15Swift MeadowUnited Kingdom409 / 500
15Golden FinchArgentina409 / 500
15Bold FalconSwitzerland409 / 500
18Nimble MarmotArmenia408 / 500
19Curious LanternKazakhstan406 / 500
20Still CedarPoland405 / 500
21Quiet CompassUnited States404 / 500
21Patient LeagueNetherlands404 / 500
21Gentle FalconUnited Kingdom404 / 500
24Still SparrowGermany403 / 500
24Quiet DatumTürkiye403 / 500
24Curious QuartzGermany403 / 500
27Curious FathomAustralia402 / 500
28Misty MarmotCanada401 / 500
28Quick LeagueKazakhstan401 / 500
30Merry PloverGermany400 / 500
30Merry CedarTanzania400 / 500
32Precise SparrowMexico399 / 500
32Steady BadgerDenmark399 / 500
34Warm PebbleAustralia398 / 500
34Crisp CloverSwitzerland398 / 500
36Gentle LeagueUnited States397 / 500
37Quiet CubitGermany396 / 500
37Misty CubitUkraine396 / 500
37Bright DatumBelgium396 / 500
37Precise CompassFrance396 / 500
37Golden LanternGermany396 / 500
42Quick CubitGermany394 / 500
42Sunny FathomMongolia394 / 500
42Swift CloverItaly394 / 500
42Warm BadgerGermany394 / 500
46Bold GaugeTürkiye393 / 500
47Sunny OtterTürkiye392 / 500
47Curious SparrowIndia392 / 500
47Warm NimbusPoland392 / 500
47Merry QuartzNepal392 / 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.