How to Estimate Size by Eye: 7 Techniques That Actually Work
Practical techniques for judging height and length without a tape measure: anchors, stacking, ratios, body rulers and the habits that make size guesses far more accurate.
GUIDES
Guides to judging size
Size It Up is a game about seeing scale correctly. These guides go deeper than the puzzle can: practical techniques for estimating size, the perception science behind the most common misses, and the reference measurements worth memorising.
Why Size Comparisons Fool Us: The Science of Misjudging Scale
Size constancy, missing scale cues, map projections and classic illusions: why the human eye misjudges how big things are, and what that means for guessing sizes.
Everyday Reference Sizes: A Cheat Sheet for Judging Scale
The real measurements of doors, ceilings, buses, sports fields, landmarks and other everyday objects — the reference sizes worth memorising for estimating anything.