How the size it up game works
You see one object with a known size, like a banana that's about 18 cm long. Next to it is a second object that has been shrunk or stretched to the wrong size. Drag the slider until you think it matches its real size compared to the first object. Then lock it in and see how close you were.
- Look at the reference. It tells you the size of one thing, for example "banana, about 18 cm".
- Find the target. This is the thing you have to resize, like a pencil, a phone or a skateboard.
- Drag the slider. Make the target as big or small as you think it really is.
- See your score. You get a score from 0 to 100 and the real size is revealed.
It sounds easy, until you realise you have no idea how long a school bus is next to a giraffe.
How the score is worked out
We measure how far off you are as a ratio, not a number of centimetres. Guessing double the real size is just as wrong as guessing half. That makes the game fair for tiny objects like a coin and big ones like a tree. The closer your guess is to the real size, the closer you get to 100. A perfect match gets you the full score.
Real sizes are common-sense values, and we mark them as "about" because real things vary. Not every banana is 18 cm.
Daily levels
- 5 levels each day. Everyone gets the same ones, so you can compare scores with friends.
- 30 everyday objects. Food, school things, animals, sports gear and stuff you find at home.
- Flat icons. Objects are shown as simple pictures, so you judge by shape and proportion, not by photo tricks.
Tips to guess better
- Use your own body. Hold your hand out. A hand is about 18 cm, a foot is about 25 cm.
- Compare with things you know. A phone is about as long as your hand, a door is taller than you.
- Don't trust your first instinct on big objects. Most people underestimate large things and overestimate small ones.
- Watch the shape. A long, thin object can feel bigger than a short, wide one even when they're the same size.
Play with friends
Everyone gets the same five levels each day, so it's easy to compare in a group chat. Guess, send your score and see who has the best eye. A fun twist: guess first, then argue about it before you open the game. The loser gets to pick the next thing you play.
Want to try something different?
Make a quiz about how well your friends know *you*. Make your own quiz in about a minute. More games are on the games page.