More “Try it Yourself” examples below.
Definition and Usage
The border-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 the border-style property before the border-width property. An element must have borders before you can set the width.
| Default value: | medium |
|---|---|
| Inherited: | no |
| Animatable: | yes. Read about animatable – Try it |
| Version: | CSS1 |
| JavaScript syntax: | object.style.borderWidth=”1px 5px” Try it |
CSS Syntax
border-width: medium|thin|thick|length|initial|inherit;
Property Values
| Value | Description | Play it |
|---|---|---|
| medium | Specifies a medium border. This is default | div { border-style:solid; border-width:medium; } |
| thin | Specifies a thin border | div { border-style:solid; border-width:thin; } |
| thick | Specifies a thick border | div { border-style:solid; border-width:thick ; } |
| length | Allows you to define the thickness of the border | div { border-style:solid; border-width:length; } |
| initial | Sets this property to its default value. Read about initial | div { border-style:solid; border-width:initial ; } |
| inherit | Inherits this property from its parent element. Read about inherit |
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;}
