Observed arrival · 2026-11-14
A ruler that asks to meet your bank card
A browser-based ruler for measuring small objects on screen in millimetres, centimetres, or inches after calibration.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- People measuring small objects or checking sizes before buying
- Worth noticing
- Calibration can use an ISO/IEC 7810 ID-1 card at 85.6 × 53.98 mm, or several listed national coins.
Field notes
Calibration uses a familiar object with published dimensions rather than relying on the browser’s CSS-pixel estimate of screen size. The page says that matching a card fixes the scale and that the setting is remembered on the device. Its inch readout includes fractions to 1/16 inch, and it offers coin alternatives alongside the card method.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
◎NicheUnusually specific use
One card from the complete issue