Observed arrival · 2026-10-19
Size Comparison Game, an eye-test for scale
A free browser game asks you to resize one real object beside another until their proportions look right.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- People curious about scale and visual perception
- Worth noticing
- The score treats guesses off by a factor of two as equally wrong, whether too large or too small.
Field notes
The interface offers dragging, pinching, or a slider, and says it is designed to work with one thumb on a phone. Its scoring description gives full marks within about 5% and zero for guesses off by a factor of two. The page says object measurements or library values are listed on a separate object library page.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
ƒJavaScriptBrowser-side code central
One card from the complete issue