CSS inline-size Property
Example
Set the size of a <div> element in the inline direction:
div {
    inline-size: 200px;
}
Try it Yourself »
More "Try it Yourself" examples below.
Definition and Usage
The inline-size property specifies the size of an element in the inline direction.
Note: The related CSS property writing-mode defines inline direction, and this affects the result of the inline-size property. For pages in English, inline direction is left to right and block direction is downward.
The CSS 
  inline-size and 
  block-size properties are very similar to CSS properties 
  width and 
  height, but the 
  inline-size and 
  block-size properties are dependent on inline and block directions.
| Default value: | auto | 
|---|---|
| Inherited: | no | 
| Animatable: | yes. Read about animatable Try it | 
| Version: | CSS3 | 
| JavaScript syntax: | object.style.inlineSize="250px" Try it | 
Browser Support
The numbers in the table specify the first browser version that fully supports the property.
| Property | |||||
|---|---|---|---|---|---|
| inline-size | 57.0 | 79.0 | 41.0 | 12.1 | 44.0 | 
CSS Syntax
inline-size: auto|value|initial|inherit;
Property Values
| Value | Description | Demo | 
|---|---|---|
| auto | Default. The element's default inline-size value. | Demo ❯ | 
| length | Specifies the inline-size in px, pt, cm, etc. Negative values are allowed. Read about length units | Demo ❯ | 
| % | Specifies the inline-size in percent relative to size of parent element on the corresponding axis. | Demo ❯ | 
| initial | Sets this property to its default value. Read about initial | |
| inherit | Inherits this property from its parent element. Read about inherit | 
More Examples
Example
With the writing-mode property value of a <div> element set to vertical-rl, the inline direction is changed from sideways to downwards, and this affect how the inlie-size property work:
div {
    inline-size: 250px;
    writing-mode: vertical-rl;
}
Try it Yourself »
Related Pages
CSS tutorial: CSS Height and Width
CSS tutorial: CSS Box model
CSS reference: height property
CSS reference: width property
CSS reference: writing-mode property