CSS border-top-width Property

The border-top-width property in CSS is used to set a specific width to the top border of an element. The border-top-style or border-style property is used for the element before using the border-top-width property.

Default Value: medium

Syntax:

border-top-width: length|thin|medium|thick|initial|inherit;

Property Values: The border-top-width property values are listed below:

length: It is used to set the width of the border. It does not take a negative value.
thin: It is used to set the thin border at the top of the element.
medium: It is used to set a medium-sized top border. It is the default value.
thick: It is used to set the thick top border.
initial: It is used to set the border-top-width to its default value.
inherit: This property is inherited from its parent.

Example: In this article, we are using the above-explained property.

HTML

<!DOCTYPE html>
<html>
<head>
    <title>
        border-top-width property
    </title>
 
    <style>
        #thin {
            border-color: green;
            border-top-style: solid;
            border-top-width: thin;
        }
 
        #medium {
            border-color: green;
            border-top-style: solid;
            border-top-width: medium;
        }
 
        #thick {
            border-color: green;
            border-top-style: solid;
            border-top-width: thick;
        }
 
        #length {
            border-color: green;
            border-top-style: solid;
            border-top-width: 20px;
        }
 
        #initial {
            border-color: green;
            border-top-style: solid;
            border-top-width: initial;
        }
    </style>
</head>
 
<body style="text-align:center">
 
    <h1 style="color:green">GeeksforGeeks</h1>
 
    <h3>border-top-width property</h3>
 
    <div id="thin">
        border-top-width: thin;
    </div><br><br>
 
    <div id="medium">
        border-top-width: medium;
    </div><br><br>
 
    <div id="thick">
        border-top-width: thick;
    </div><br><br>
 
    <div id="length">
        border-top-width: length;
    </div><br><br>
 
    <div id="initial">
        border-top-width: initial;
    </div>
</body>
</html>