Size It UpDaily size guessing game

Five rounds a day · free · no account

Size It Up: guess the size

Size It Up is a daily size guessing game. Resize a silhouette until it matches the real size, lock it in, and see the red outline.

Round 1 / 5

Daily No. 19 · 2026-10-11 UTC · five rounds · 500 max

0 / 500

How long is Koala?

White Rhinoceros3.7 m length

CC0 original · length. Reference stays true to scale.

Koala · Your guess · 3.7 m length

This board is linear, not logarithmic: twice as wide means twice the real size. The midpoint is marked. Half and double score the same.

How to play the Size It Up guessing game

  1. Read the reference. It is already at true scale, with its real measurement labelled.
  2. Slide on the board or use the slider until the cream silhouette looks right. The midpoint number is marked.
  3. Lock in. The true size lands in red. Then see where you sit among everyone who finished today.

Size It Up scoring

Scoring

Size It Up is a linear size comparison

Twice as wide means twice the real length. The midpoint of the ruler is labelled, and the slider is not logarithmic.

Today's Size It Up

Everyone gets the same five rounds until 00:00 UTC. Post a name after the last lock-in. An empty wall still ranks you 1 of 1.

Lock in on Size It Up

The red outline shows the real measurement. The next round is a new pair. Each object cites a public source for that number.

What Size It Up is not

Not a logo quiz, and not affiliated with Magnitudle or Sizivo. The silhouettes are public-domain originals, listed on the credits page.