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

Every challenge. Every day.

Ranked by average score

Leading the wayAll time

29,560 entries

#1SETTING THE PACE

Curious Marmot

Türkiye
480Average

Total points: 480Days played: 1

#2

Curious Maple

474Average

Total points: 474Days played: 1

#3

Golden Meadow

France
471Average

Total points: 471Days played: 1

The full lineup

A little better, every day.
All time Size It Up rankings. Equal average scores share the same rank.
RankEntryCountryDays playedDaysTotal pointsAverage scoreAverage
01Curious MarmotTürkiye1480480
02Curious Maple1474474
03Golden MeadowFrance1471471
04Curious NimbusGermany1470470
05Curious KernelSpain1464464
06Gentle ThistleGermany1459459
07Brave CedarGermany1457457
08Tall WillowFrance1454454
09Misty LeagueSpain1453453
10Precise BadgerFrance1452452
10Sikima21Serbia1452452
12Tiny ThistleFrance1451451
13Tall NotchTürkiye1448448
13Tiny CloverItaly1448448
15Rare KernelGermany1447447
15Keen CloverGermany1447447
17Golden MarmotDenmark1446446
17Bold CompassNetherlands1446446
17Merry BadgerFrance1446446
20Gentle SparrowLatvia1445445
21Wild LanternBulgaria1442442
21Modest FathomFrance1442442
21Bright CubitGermany1442442
24Steady FathomFrance1441441
25Calm KernelKazakhstan1438438
25Merry NimbusDenmark1438438
27Silver FalconTürkiye1437437
28Lucky CubitFrance1436436
28Precise WillowSpain1436436
30Gentle BadgerGermany1435435
30Gentle BirchRussia1435435
32Modest FathomGermany1434434
32Warm OtterBrazil1434434
34Quick ThistleFrance1433433
34Precise PebbleGermany1433433
36Bright CompassFrance1432432
36Swift CedarFrance1432432
36Sunny QuartzFrance1432432
39Nimble QuartzMongolia1431431
39Nimble MarmotTürkiye1431431
41Quiet SpanUnited Kingdom1430430
41Nimble FathomFrance1430430
41Swift PlumbFrance1430430
44Crisp CompassFrance1429429
44Swift FinchChina1429429
46Quick Kernel1428428
46Golden OtterFrance1428428
46Bold GaugeArgentina1428428
49Keen Cubit1427427
49Tiny FinchFrance1427427

Showing the top 50 entries.

Your name could be here. Play today’s challenge

Average daily score. Equal averages share a rank.

How the leaderboard works

Average score = total points ÷ days played. Only submitted days count; unplayed days are not counted as zero. Rankings use unrounded averages. 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 reset at 00:00 UTC; monthly rankings follow the UTC calendar month.