Free · unlimited objects

Size It Up Game

Drag the object until it feels right

Size It Up names an object and lets you drag its edges until it matches the size in your head. A whale, a tower, a shipping container. You commit, the real one appears, and the gap is the score.

  • 01Drag an object to the size you believe
  • 02No figures to type or estimate
  • 03The real object appears at the reveal
  • 04Runs in the browser, no account
01

Sizing by hand instead of by number

Asked for a length in metres, most people freeze. Asked to drag a shape until it looks right, the same people are often surprisingly close.

The game uses the hand rather than the vocabulary, which turns out to be the more accurate instrument.

Size It Up game@sizeitup

How a Size It Up round works

An object is drawn on a plain background at an arbitrary starting size. You drag its edges until it matches your sense of the real thing, then commit. The actual object is drawn over yours at its true scale, and the difference between the two outlines becomes the result.

A drawn object with drag handles on its edges before committing a size
Size It Up game@sizeitup

Why dragging beats typing a number

A figure in metres requires a unit you may not hold accurately. Dragging is comparative: you are matching a shape against everything else you know about the world. The result is often closer than a stated estimate, even from people who claim no sense of scale.

A drag gesture compared against a typed measurement field
Size It Up game@sizeitup

The reveal is the lesson

Seeing the true size drawn over your attempt fixes the error better than a number does. Objects that are commonly misjudged, like the height of a famous tower or the length of a large animal, tend to be misjudged in the same direction by most players.

Two outlines overlapping, one drawn by hand and one at true scale
Size It Up game@sizeitup

Scale without a reference object

Some rounds include a familiar object for comparison, and some deliberately leave it out. Without a reference the task is harder, because nothing on screen carries a known size. That is the version that measures instinct rather than arithmetic.

An empty frame holding one object with no scale reference beside it
02

What a round gives you

A shape, a drag handle and a true-size overlay.

01

Direct manipulation

The object is resized by dragging rather than by entering a value. Every adjustment is visible immediately, so the shape stays the focus.

02

Overlay at true size

The reveal draws the real object on top of yours. The overlap, or the lack of it, is the result rather than a percentage.

03

No numbers until the end

Measurements stay hidden during the round. You are judging a size, not reading one, which is what keeps the game about instinct.

04

Rounds with and without a reference

Some objects arrive next to something familiar, others alone. The mix separates rounds you can reason through from rounds you have to feel.

03

Sizing an object up

Three actions per round.

  1. Read what the object is

    The name is the only information. Decide whether you are picturing a length, a height or a footprint before touching the handles.

  2. Drag it to size

    Pull the edges until the object matches the size in your head. Adjust in both directions; the first size is usually too small.

  3. Commit and compare

    Lock the size and the true object appears over yours. The next round starts with a different object and a fresh frame.

04

Judging by hand

Three players on their own sense of scale.

I am accurate on buildings and hopeless on animals. The reveal made that split obvious within five rounds.
OPOlga P.Architecture student
She has no idea how tall anything is and still beats me on the natural objects. Dragging suits the way she thinks about size.
DRDiego R.Plays with his daughter
I always start too small. Knowing that, I now drag past my instinct and my scores improved without learning anything new.
HBHanna B.Plays on a laptop
05

Size It Up questions

How sizing is judged and what counts as close.

Pick a size and commit

One object, one frame, and the true scale drawn over your attempt.

Size it up