CSS border-bottom-width Property
Last Updated :
11 Jul, 2025
The border-bottom-width property in CSS is used to set a specific width to the bottom border of an element. The border-bottom-style or border-style property is used for the element before using the border-bottom-width property.
Syntax:
border-bottom-width: length|thin|medium|thick|initial|inherit;
Property Values: The border-bottom-width property values are listed below:
| Value | Description |
|---|
| thin | Sets a thin border width. |
| medium | Sets a medium border width (default). |
| thick | Sets a thick border width. |
| length | Sets the border width using a specific length value. Does not accept negative values. |
Example: In this example we demonstrates the border-bottom-width property using different values (thin, medium, thick, and 20px). Each styled <div> shows a solid green bottom border with specified widths, illustrating how each value affects border thickness.
html
<!DOCTYPE html>
<html>
<head>
<title>
border-bottom-width property
</title>
<style>
#thin {
border-color: green;
border-bottom-style: solid;
border-bottom-width: thin;
}
#medium {
border-color: green;
border-bottom-style: solid;
border-bottom-width: medium;
}
#thick {
border-color: green;
border-bottom-style: solid;
border-bottom-width: thick;
}
#length {
border-color: green;
border-bottom-style: solid;
border-bottom-width: 20px;
}
</style>
</head>
<body style="text-align:center">
<h1 style="color:green">GeeksforGeeks</h1>
<h3>border-bottom-width property</h3>
<div id="thin">
border-bottom-width: thin;
</div><br><br>
<div id="medium">
border-bottom-width: medium;
</div><br><br>
<div id="thick">
border-bottom-width: thick;
</div><br><br>
<div id="length">
border-bottom-width: length;
</div>
</body>
</html>
Output:
Supported Browsers: The browser supported by border-bottom-width property are listed below: