max-inline-size

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

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

Try it

Syntax

css

/* <length> values */
max-inline-size: 300px;
max-inline-size: 25em;
max-inline-size: anchor-size(width);
max-inline-size: anchor-size(--myAnchor self-block, 200px);

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

/* Keyword values */
max-inline-size: none;
max-inline-size: max-content;
max-inline-size: min-content;
max-inline-size: fit-content;
max-inline-size: fit-content(20em);

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

Values

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

Formal definition

Initial value	`none`
Applies to	same as `width` and `height`
Inherited	no
Percentages	inline-size of containing block
Computed value	same as `max-width` and `max-height`
Animation type	a length, percentage or calc();

Formal syntax

max-inline-size = 
  <'max-width'>  

<max-width> = 
  none                                      |
  <length-percentage [0,∞]>                 |
  min-content                               |
  max-content                               |
  fit-content( <length-percentage [0,∞]> )  

<length-percentage> = 
  <length>      |
  <percentage>

Examples

Setting maximum inline size in pixels

HTML

html

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

CSS

css

.exampleText {
  writing-mode: vertical-rl;
  background-color: yellow;
  block-size: 100%;
  max-inline-size: 200px;
}

Result

Specifications

Specification
CSS Logical Properties and Values Level 1 # propdef-max-inline-size
CSS Box Sizing Module Level 4 # sizing-values

Browser compatibility

BCD tables only load in the browser