inline-size

The inline-size CSS property defines the horizontal or vertical size of an element's block, depending on its writing mode. It corresponds to either the width or the height property, depending on the value of writing-mode.

If the writing mode is vertically oriented, the value of inline-size relates to the height of the element; otherwise, it relates to the width of the element. A related property is block-size, which defines the other dimension of the element.

Syntax

/* <length> values */
inline-size: 300px;
inline-size: 25em;

/* <percentage> values */
inline-size: 75%;

/* Keyword values */
inline-size: max-content;
inline-size: min-content;
inline-size: fit-content(20em);
inline-size: auto;

/* Global values */
inline-size: inherit;
inline-size: initial;
inline-size: revert;
inline-size: unset;

Values

The inline-size property takes the same values as the width and height properties.

Formal definition

Initial valueauto
Applies tosame as width and height
Inheritedno
Percentagesinline-size of containing block
Computed valuesame as width and height
Animation typea length, percentage or calc();

Formal syntax

<'width'>

Examples

Setting inline size in pixels

HTML

<p class="exampleText">Example text</p>

CSS

.exampleText {
  writing-mode: vertical-rl;
  background-color: yellow;
  inline-size: 110px;
}

Result

Specifications

Specification
CSS Logical Properties and Values Level 1
# dimension-properties

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariWebView AndroidChrome AndroidFirefox for AndroidOpera AndroidSafari on iOSSamsung Internet
inline-size
fit-content
fit-content()
Experimental
max-content
min-content
Full support
Full support
No support
No support
Experimental. Expect behavior to change in the future.
User must explicitly enable this feature.
Uses a non-standard name.
Requires a vendor prefix or different name for use.

See also