Resize the red silhouette beside the blue reference. Compare 700+ real and fictional objects across 22 categories, from planets and coins to iconic screen characters and spacecraft.
Drag, pinch or scroll over the red object (or use the slider) until both are at their true relative size.
Keyboard: ← → to resize (hold Shift for fine steps), Enter to lock in.
Each round shows a reference object in blue and a mystery object in red. Drag, pinch, scroll or use the slider to resize the red silhouette, then lock in your guess. Both silhouettes keep their real width and height, so the only thing you control is the scale.
Your error is measured on a logarithmic scale, so a guess twice too big costs exactly as much as a guess twice too small. Landing within 3% of the true size earns a perfect 100. Each round is worth up to 100 points, so a daily puzzle is worth 500.
Explore planets, animals, buildings, vehicles, food and coins, plus MCU, DC, Star Wars ships and Transformers. Real objects use published or typical measurements; fictional sizes are approximate and depend on the depicted version.
Everyone gets the same five comparisons every day, with a new puzzle at 00:00 UTC. Unlimited mode lets you play any category, challenge links let friends replay your exact set, and in the Workshop you can publish your own comparisons with custom objects.
A few of the real-world ratios hiding in the game. Can you guess them at first sight?
| Object | Compared with | How many times bigger |
|---|---|---|
| Jupiter | Earth | 11.0× (diameter) |
| Sun | Earth | 109× (diameter) |
| Earth | Moon | 3.67× (diameter) |
| Betelgeuse | Sun | 764× (diameter) |
| Burj Khalifa | Eiffel Tower | 2.51× (height) |
| Empire State Building | Statue of Liberty | 4.77× (height) |
| Starship (full stack) | Statue of Liberty | 1.30× (height) |
| Blue whale | Tyrannosaurus rex | 2.03× (length) |
| Argentinosaurus | Blue whale | 1.40× (length) |
| Giraffe | Adult man | 3.14× (height) |
| Airbus A380 | Boeing 737-800 | 1.84× (length) |
| Icon of the Seas | RMS Titanic | 1.36× (length) |
| Basketball | Tennis ball | 3.57× (diameter) |
| US quarter (25¢) | US penny (1¢) | 1.27× (diameter) |
Choose any of the 22 categories in Unlimited mode: Each category remembers the objects you have seen and shows unused ones first.
You see two silhouettes: the blue one is shown at its real size, the red one starts at a random scale. Resize the red object by dragging, pinching, scrolling over it or using the slider and the + and − buttons, then press Lock in. The game animates the red object to its true size and shows how far off you were.
The score depends on the ratio between your guess and the real size, measured on a logarithmic scale. Within 3% you get 100 points; the further off you are, the fewer points you earn, and a guess six times too big or too small scores zero. Being 50% too big and 33% too small are treated as the same mistake.
Real objects use published measurements or typical adult sizes. Silhouettes are simplified for comparison. MCU, DC, Star Wars ships and Transformers use approximate, version-specific dimensions; fictional figures should not be treated as universal canon.
Every day at 00:00 UTC. Everyone in the world gets the same five comparisons, so you can compare scores with friends. Your progress, statistics and streak are saved in your browser.
Yes. Build a set of 3 to 20 rounds using catalog objects or your own named objects, dimensions and silhouettes. Publishing costs 50 coins and playing is free. The author earns 1 coin for a like from each unique other signed-in account after that player completes the set; plays alone do not earn coins.
Yes. On touch screens you can pinch or drag to resize and use the large slider and buttons; on a computer you can also use the mouse wheel and the arrow keys (Shift for fine steps, Enter to lock in). No download or sign-up is needed to play.
Some animal silhouettes are based on icons from game-icons.net by Lorc, Delapouite and contributors (CC BY 3.0), modified.