"The moon from earth is about 24.3px wide, for example. The Eiffel Tower from a mile away is about 550.5px tall. That means that when you do “{ width: 24.3px }” in CSS 2.1, you’re making something as wide as the moon looks to be."

—

Antipodean: CSS px is an Angular Measurement

Edit: In CSS3, 1px=1/96in.

Tags: