<dimension>

A general term for any CSS value that combines a number with a unit (like '10px', '2em', or '50%').

/* Usage Example */
.box {
  /* Examples of different dimension types */
  width: 100px;  /* length */
  font-size: 1.2rem; /* length */
  opacity: 0.5; /* number (not a dimension) */
}
Widely available Since 2015 96% global usage

This feature is well established and works across many devices and browser versions. It has been available across browsers since 2015.

1+
1+
1+
12+
Kinsta

Your first month is free

Managed WordPress hosting for faster sites.

Learn more

New CSS drops.

Join 600+ readers who've survived clearfix hacks.

ESC