Guess the Size
You never type a number here. Guess the Size puts a known object, like a person, next to something else, and you stretch it until the two look right together.
Opens the real game on guessthesize.com. Free, in a new tab.
How Guess the Size works
Look at the reference. On the left is something with its real size marked, such as an adult person.
Stretch the object. Resize the object on the right by dragging, using the slider or pinching.
Lock in. Confirm your guess when the two look right side by side. The game then shows the real size, how far off you were, your score and a fact.
Three ways to play
| Mode | Objects | Top score |
|---|---|---|
| Daily | 5 | 500 |
| Unlimited | 10 per run | 1,000 |
| Duel | Rounds until hearts run out | Climb from Bronze to Master |
A worked example
Say the reference is a person about 1.7 metres tall and the object is a giraffe. A giraffe is around 5.5 metres, a bit over three times the person. If you picture three people stacked up, you are already close. That habit of counting references works for almost any object.
Common Guess the Size questions
What things do you guess the size of?
Animals, food, landmarks, vehicles, space objects and more. Each one is shown beside a reference with a known size.
Is this a size comparison game?
Yes. Every round compares one object with a familiar one, and you set the size by eye instead of typing a number.
When does the daily change?
At your local midnight. Everyone gets the same objects.
How does Duel work?
Each round has a 12 second limit. The closer guess knocks a heart off the other player, and a guess within 6% hits twice.
Can I pick a topic?
Yes. Quick 5 round games are available for each category, such as animals, bugs, food or landmarks.
Guess the Size strategy
- Think in multiples of the reference. Is it twice as tall as a person, or ten times?
- Animals are often smaller or bigger than films make them look. Trust facts over movies.
- Use category play to practise the kind of object you are worst at.
- In Duel you only have 12 seconds, so go with your first read and adjust once.
Guess the Size in numbers
- Daily
- 5 objects, up to 500 points
- Unlimited
- 10 objects a run, up to 1,000 points
- Duel
- Head to head with hearts, Bronze to Master
- Categories
- Animals, food, landmarks, vehicles, space and more
- Input
- Drag, slider or pinch
- Account
- Not needed
- Category
- Estimation games, size
Facts checked on 2026-11-09. Guess the Size belongs to Guess the Size. Megadle is not linked to it.