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

1,432 entries

#1TOP SCORE

Curious Marmot

Türkiye
480 / 500
#2

Steady League

Germany
463 / 500
#3

Amber Plumb

Australia
456 / 500

The full lineup

A perfect eye scores 500.
October 9, 2026 Size It Up rankings. Equal scores share the same rank.
RankEntryCountryScore
01Curious MarmotTürkiye480 / 500
02Steady LeagueGermany463 / 500
03Amber PlumbAustralia456 / 500
04Tiny CloverItaly448 / 500
05Merry BadgerFrance446 / 500
06Swift FinchChina429 / 500
07Nimble FalconHong Kong424 / 500
08Bright FinchTürkiye420 / 500
09Silver BadgerUnited Kingdom419 / 500
10Nimble FathomFrance416 / 500
11Sunny CedarTaiwan414 / 500
12Calm LanternFrance413 / 500
13Quick MaplePoland411 / 500
14Misty NimbusTürkiye405 / 500
15Crisp MeadowGermany403 / 500
16Calm FathomGermany402 / 500
16Silver CubitGermany402 / 500
16Patient PebbleItaly402 / 500
19Patient HeronFrance398 / 500
20Brave BirchSpain397 / 500
21Still CompassSpain396 / 500
21Lucky DatumFrance396 / 500
23Calm GaugeUnited States391 / 500
24Gentle LeagueAustria390 / 500
24Rare PebbleSpain390 / 500
24Precise BirchUnited States390 / 500
27Wild HarborMongolia389 / 500
28Precise SparrowGermany385 / 500
29Golden HeronFrance383 / 500
29Misty CompassPoland383 / 500
31Merry MeadowGermany382 / 500
31Amber SpanMongolia382 / 500
33Warm HarborTürkiye381 / 500
34Precise HarborFrance380 / 500
35Wild HarborArgentina376 / 500
35Sunny GaugeUnited Arab Emirates376 / 500
35Quick KernelSpain376 / 500
38Quick ThistleSpain375 / 500
39Warm FinchFrance374 / 500
40Bold MarmotSpain373 / 500
40Warm FathomSweden373 / 500
40Amber FathomFrance373 / 500
43Modest SpanFrance372 / 500
43Calm BirchFrance372 / 500
43Tiny SparrowIndia372 / 500
46Quiet QuartzGermany371 / 500
46Silver NimbusGermany371 / 500
48Crisp PlumbAustralia370 / 500
49Lucky CompassGermany369 / 500
49Swift CloverFrance369 / 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.