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

October 2026

Ranked by average score

Leading the wayLive

24,114 entries

#1SETTING THE PACE

Curious Marmot

Türkiye
480Average

Total points: 480Days played: 1

#2

Sikima21

Serbia
452Average

Total points: 452Days played: 1

Joint #3

Tall Notch

Türkiye
448Average

Total points: 448Days played: 1

The full lineup

A little better, every day.
This month Size It Up rankings. Equal average scores share the same rank.
RankEntryCountryDays playedDaysTotal pointsAverage scoreAverage
01Curious MarmotTürkiye1480480
02Sikima21Serbia1452452
03Tall NotchTürkiye1448448
03Tiny CloverItaly1448448
05Rare KernelGermany1447447
05Keen CloverGermany1447447
07Golden MarmotDenmark1446446
07Bold CompassNetherlands1446446
07Merry BadgerFrance1446446
10Gentle SparrowLatvia1445445
11Bright CubitGermany1442442
12Quiet SpanGermany1439439
13Calm KernelKazakhstan1438438
13Merry NimbusDenmark1438438
15Silver FalconTürkiye1437437
16Precise WillowSpain1436436
17Gentle BadgerGermany1435435
17Gentle BirchRussia1435435
19Modest FathomGermany1434434
19Warm OtterBrazil1434434
21Precise PebbleGermany1433433
22Sunny QuartzFrance1432432
23Nimble QuartzMongolia1431431
23Nimble MarmotTürkiye1431431
25Swift PlumbFrance1430430
26Swift FinchChina1429429
27Bold GaugeArgentina1428428
28Lucky MeadowSerbia1427427
28Precise QuartzTürkiye1427427
30Warm SparrowUnited Kingdom1426426
31Nimble SparrowItaly1425425
32Quick SparrowBelarus1424424
32Patient QuartzTürkiye1424424
32Nimble FalconHong Kong1424424
35Tall PlumbTürkiye1423423
35Sunny ThistleAustria1423423
37Rare CompassUruguay1422422
38Bright FinchTürkiye1420420
39Rare BirchBelarus1419419
39Patient QuartzTürkiye1419419
39Silver CompassSwitzerland1419419
39Steady CubitTürkiye1419419
39Silver BadgerUnited Kingdom1419419
44Silver DatumPoland1418418
44Curious OtterAustria1418418
46Calm PebbleGermany1417417
46Amber KernelFrance1417417
48Precise PebbleGermany1416416
48Bold PebbleUnited States1416416
48Gentle LeagueFrance1416416

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.