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
Best daily rank
—
Days on the board
0
Average score
—out of 500

Your ranking, over time

A little practice. A new perspective every day.

Your first rank is the starting line.

Finish a daily challenge. Your score will automatically join the leaderboard and appear here.

Ranking history

Daily rankings · UTC

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Your date, daily rank, score, and number of entries will show up here.