min-inline-size

Baseline Widely available *

This feature is well established and works across many devices and browser versions. It’s been available across browsers since January 2020.

* Some parts of this feature may have varying levels of support.

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

Try it

min-inline-size: 200px;
writing-mode: horizontal-tb;

min-inline-size: 200px;
writing-mode: vertical-rl;

min-inline-size: 20px;
writing-mode: horizontal-tb;

min-inline-size: 75%;
writing-mode: vertical-lr;


  Change min-inline-size

#example-element {
  display: flex;
  flex-direction: column;
  background-color: #5b6dcd;
  height: 80%;
  justify-content: center;
  color: #ffffff;
}

Syntax

css

/*  values */
min-inline-size: 100px;
min-inline-size: 5em;
min-inline-size: anchor-size(width);

/*  values */
min-inline-size: 10%;

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

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

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

Values

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

Formal definition

Initial value	`0`
Applies to	same as `width` and `height`
Inherited	no
Percentages	inline-size of containing block
Computed value	same as `min-width` and `min-height`
Animation type	a length, percentage or calc();

Formal syntax

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

 = 
  auto                                      |
                   |
  min-content                               |
  max-content                               |
  fit-content(  )  |
                               |
                             

 = 
        |
    

 = 
  calc-size(  ,  )  

 = 
  anchor-size( [  ||  ]? , ? )  

 = 
    |
     |
  any             |
        

 = 
   [ [ '+' | '-' ]  ]*  

 = 
    

 = 
  width        |
  height       |
  block        |
  inline       |
  self-block   |
  self-inline  

 = 
   [ [ '*' | / ]  ]*  

 = 
          |
       |
      |
    |
  (  )  

 = 
  e          |
  pi         |
  infinity   |
  -infinity  |
  NaN

Examples

Setting minimum inline size for vertical text

HTML

html

Example text

CSS

css

.exampleText {
  writing-mode: vertical-rl;
  background-color: yellow;
  block-size: 5%;
  min-inline-size: 200px;
}

Result

Specifications

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