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

657 entries

#1TOP SCORE

Curious Maple

474 / 500
#2

Gentle Fathom

Germany
440 / 500
#3

Bold Gauge

430 / 500

The full lineup

A perfect eye scores 500.
September 28, 2026 Size It Up rankings. Equal scores share the same rank.
RankEntryCountryScore
01Curious Maple474 / 500
02Gentle FathomGermany440 / 500
03Bold Gauge430 / 500
04Quick Kernel428 / 500
05Keen Cubit427 / 500
06Still Plumb416 / 500
06Gentle Nimbus416 / 500
08Quick Span414 / 500
09Calm Heron413 / 500
10Gentle Gauge412 / 500
11Misty Marmot409 / 500
12Steady Sparrow407 / 500
12Silver Badger407 / 500
14Nimble Plover406 / 500
15Soft Gauge401 / 500
16Steady Plumb400 / 500
17Warm Datum398 / 500
18Misty Thistle397 / 500
19Steady Span396 / 500
19Golden Gauge396 / 500
21Lucky Plumb394 / 500
22Wild Datum393 / 500
23Soft Sparrow392 / 500
23Quiet SpanGermany392 / 500
25Brave PlumbQatar391 / 500
25Calm MarmotTürkiye391 / 500
25Modest Badger391 / 500
28Gentle Nimbus390 / 500
28Still Sparrow390 / 500
28Brave League390 / 500
31Brave Fathom387 / 500
31Bold Nimbus387 / 500
33Tiny Otter385 / 500
33Tiny OtterCanada385 / 500
33Misty Datum385 / 500
33Curious Lantern385 / 500
37Bold Plover384 / 500
37Misty Meadow384 / 500
39Precise Cedar383 / 500
39Calm Kernel383 / 500
41Modest Finch382 / 500
42Soft Birch381 / 500
42Bright Marmot381 / 500
44Modest Heron380 / 500
45Merry Badger379 / 500
45Warm Falcon379 / 500
45Tiny Plumb379 / 500
48Curious Pebble378 / 500
48Soft Plover378 / 500
50Swift Badger377 / 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.