<length>

A CSS data type representing a distance value. It consists of a number followed by a unit (like 'px', 'em', 'rem', 'vw', etc.).

/* Usage Example */
h1 {
  /* Uses various length units */
  font-size: 2.5rem;
  margin-top: 20px;
  width: 50vw;
}
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