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
September 2026
2627282930
Daily challenges follow UTC.Go to today
UTC daily challenge

Leading the wayLive

953 entries

#1SETTING THE PACE

Silver Falcon

Türkiye
437 / 500
#2

Warm Otter

Brazil
434 / 500
#3

Swift Plumb

France
430 / 500

The full lineup

A perfect eye scores 500.
Daily Size It Up rankings. Equal scores share the same rank.
RankEntryCountryScore
01Silver FalconTürkiye437 / 500
02Warm OtterBrazil434 / 500
03Swift PlumbFrance430 / 500
04Precise QuartzTürkiye427 / 500
05Gentle FinchFrance425 / 500
06Tiny SparrowIndia421 / 500
07Quiet PloverSpain400 / 500
08Keen QuartzFrance396 / 500
09Quiet SparrowPoland393 / 500
10Amber CloverFrance391 / 500
11Tall DatumUnited States389 / 500
12Tall MeadowUnited States384 / 500
12Keen PlumbMexico384 / 500
14Rare CompassSwitzerland383 / 500
15Quick CompassSpain382 / 500
15Misty MarmotSpain382 / 500
15Merry MeadowCzechia382 / 500
18Merry DatumThailand381 / 500
19Quick BadgerBrazil377 / 500
20Quick HarborFrance375 / 500
21Golden BirchFrance374 / 500
22Steady DatumUnited States373 / 500
22Misty HarborIreland373 / 500
22Bold CedarGermany373 / 500
22Quick WillowAustralia373 / 500
26Warm NotchCzechia372 / 500
27Still CubitSpain371 / 500
27Bold QuartzSwitzerland371 / 500
27Tall ThistleGermany371 / 500
30Tiny PlumbAustralia369 / 500
30Calm MapleFrance369 / 500
32Merry FathomLatvia367 / 500
33Merry LeagueFrance366 / 500
34Silver FathomPoland365 / 500
35Bright MapleSpain364 / 500
35Crisp DatumAustralia364 / 500
35Tall HarborFrance364 / 500
35Curious SparrowItaly364 / 500
39Bright FinchBelgium363 / 500
39Swift SpanUnited States363 / 500
41Gentle NotchSpain362 / 500
41Modest LanternBrazil362 / 500
43Keen ThistleTürkiye361 / 500
43Crisp WillowFrance361 / 500
45Calm MapleChile360 / 500
45Lucky CubitSwitzerland360 / 500
47Patient WillowUnited States359 / 500
48Brave LanternUnited Kingdom358 / 500
48yaministerNetherlands358 / 500
50Nimble FinchUnited States357 / 500

Showing the top 50 entries.

Your name could be here. Play today’s challenge

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.