Today’s challengeRound 1 of 5
0 / 500
How large is the target compared with the reference?
Navy stays fixed. Resize red.
The fixed reference is on the left and the resizable target is on the right. Use the scale control or arrow keys, then lock in your estimate.
Excellent eye — 90/100
Your estimate was close to the true comparison.
Scale note
Each result reveals one useful anchor for your next estimate.
Measurement sources and conventions →Compare these objects in the size library →Daily complete
0/500
Five guesses made. The result bars show where your visual intuition was sharpest.
0day streak
0personal best
00:00next daily
A spoiler-free PNG, made on your device. No answers or guesses included.
More to play todayYour stats & history →
Daily progress on this browser. Resets at 00:00 UTC; replays have separate saves.
Chat, what is your guess?Smaller · Same size · 2× · 5×Choose your scale, then press Enter to reveal.
↑↓ resizeEnter lock or continueF fullscreenS stream · C chat