CSSborder-width Property
More "Try it Yourself" examples below.
Definition and Usage
Theborder-width property sets the width of an element's four borders. This property can have from one to four values.
Examples:
- border-width: thin medium thick 10px;
- top border is thin
- right border is medium
- bottom border is thick
- left border is 10px
- border-width: thin medium thick;
- top border is thin
- right and left borders are medium
- bottom border is thick
- border-width: thin medium;
- top and bottom borders are thin
- right and left borders are medium
- border-width: thin;
- all four borders are thin
Note: Always declare theborder-style property before theborder-widthproperty. An element must have borders before you can set the width.
| Default value: | medium |
|---|---|
| Inherited: | no |
| Animatable: | yes.Read aboutanimatableTry it |
| Version: | CSS1 |
| JavaScript syntax: | object.style.borderWidth="1px 5px"Try it |
Browser Support
The numbers in the table specify the first browser version that fully supports the property.
| Property | |||||
|---|---|---|---|---|---|
| border-width | 1.0 | 4.0 | 1.0 | 1.0 | 3.5 |
CSS Syntax
border-width: medium|thin|thick|length|initial|inherit;
Property Values
| Value | Description | Demo |
|---|---|---|
| medium | Specifies a medium border. This is default | Demo ❯ |
| thin | Specifies a thin border | Demo ❯ |
| thick | Specifies a thick border | Demo ❯ |
| length | Allows you to define the thickness of the border.Read about length units | Demo ❯ |
| initial | Sets this property to its default value.Read aboutinitial | |
| inherit | Inherits this property from its parent element.Read aboutinherit |
More Examples
Example
Set the width of the top and bottom borders to 10px, and the width of the left and right borders to 1px:
div {border-width: 10px 1px;}
Try it Yourself »Related Pages
CSS tutorial:CSS Border
HTML DOM reference:borderWidth property
