border-bottom-width defines the width of the bottom border.
The width is set as a pixel value, or as thin, medium, or thick.
A thin border-bottom-width.
<style>
.border-bottom-thin {
padding: 20px;
border-bottom-style: solid;
border-bottom-color: tomato;
border-bottom-width: thin;
}
</style>
<div class="border-bottom-thin">
An element with a thin bottom border
</div>
The default border-bottom-width is medium or 1 pixel.
A border-bottom-style value is required for a border to show.
border-bottom-width: medium | thin | thick |
length | initial | inherit;
| Value | Description |
|---|---|
| medium | Default. Medium border |
| thin | Thin border |
| thick | Thick border |
| length | Sets border thickness using CSS units |
| initial | Sets the value to its default value. |
| inherit | Inherits the value from its parent element. |
Click the buttons to see the different border-bottom-width values.
<style>
.border-bottom-example {
padding: 20px;
border-bottom-style: solid;
border-bottom-color: tomato;
border-bottom-width: thin;
}
</style>
<div class="border-bottom-example">
border-bottom-width: thin
</div>
This table shows when border-bottom-width support started for each browser.
 Chrome
|
1.0 | Dec 2008 |
 Firefox
|
1.0 | Nov 2004 |
 IE/Edge
|
4.0 | Sep 1997 |
 Opera
|
3.5 | Nov 1998 |
 Safari
|
1.0 | Jun 2003 |
