CSS outline-width property specify the width of an element’s outline (2px, 2em, etc.).
CSS property outline-width
| CSS version: | CSS 2.1 | 
| Value: | thin | medium | thick | length | inherit | 
| Initial: | medium | 
| Applies to: | all elements | 
| Inherited: | no | 
Example css outline-width
In the following code, CSS property outline-width can be changed to the following values
- 4px
 - 8px
 - 4em
 - thin
 - medium
 - thick
 
<style type="text/css">
div {
  width:150px; height:100px;
  background-color: lightgray;
  border: 4px solid gray;
  outline-width: 4px;
  outline-style: solid;
  outline-color: lightblue;
}
</style>
<div></div>outline-width  refresh