Size Comparison Game

Magnitude Game

Two real things, drawn the same size. Say how many times one is the other.

How does Eiffel Tower compare with Statue of Liberty?

Statue of Liberty
Eiffel Tower

Eiffel Tower and Statue of Liberty are drawn the same size here, on purpose. Which one is actually bigger, and by how many times, is the question.

1×

Rounds 0Average score —Best —

How to play

  1. 1. Two real quantities appear

    Their icons are the same size on purpose.

  2. 2. Set the factor

    The slider runs from about 1/40 to about 40, and it starts at 1×.

  3. 3. Lock the gap

    The score uses the same ratio rule as the homepage.

  4. 4. Read both figures

    Each measurement links to the source it was taken from.

Questions

What is a magnitude game?

A magnitude game asks how far apart two quantities are — how many times bigger one is than the other — not the exact number.

How is the gap scored?

By ratio. Within about 5% of the true factor you get full marks, and the score falls to zero once you are off by a factor of two. Saying the gap is twice as wide as it is, and saying it is half as wide, cost the same.

Why are the two pictures the same size?

So the drawing cannot leak the answer. You set a number of times — from about a fortieth to about forty — and the measurements appear only after you lock.

Is it free and unlimited?

Yes. Free in the browser, no account, and a new pair as soon as you want one. There is no daily puzzle.

How is this different from resizing a silhouette?

The homepage asks you to drag one object until it looks right beside the other. This page asks for the factor itself, with both icons held at the same size.

More ways to play

Size Comparison GameResize one silhouette beside another and judge the ratio.Guess the SizeOne object, one dimension — dial in a real measurement.Bigger or SmallerThe two-choice version, fastest on a phone.

Why the pictures stay the same size

The question never tells you which one is bigger. A factor below 1× means the second thing is smaller. The pictures stay matched until you have committed, because a drawing at true scale would answer the round for you.