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CSS border-width (Set/Change Width of a Border)
The CSS border-width property is used to define the width of the border around an element. For example:
HTML with CSS Code
<!DOCTYPE html> <html> <head> <style> p {border-style: solid; border-width: 10px;} </style> </head> <body> <p>This is para one.</p> </body> </html>
Output
This is para one.
Note - To define the width of a border, a border must to be exist. Therefore, border-style property must be defined to create a border, before defining the width.
CSS border-width Syntax
The syntax of border-width property in CSS, is:
border-width: x;
The value of x should be any of the following:
- thin - used to define thin top border
- medium - used to define medium top border
- thick - used to define thick top border
- length - used to define custom size top border
- initial - used to define the default value for the size of top border
- inherit - used to inherit the value from its parent
CSS border-width with Multiple Values
We can also define the border-width property with multiple values.
border-width with Four Values
- First value applies to top border
- Second value applies to right border
- Third value applies to bottom border
- Fourth value applies to left border
border-width with Three Values
- First value applies to top border
- Second value applies to right and left border
- Third value applies to bottom border
border-width with Two Values
- First value applies to top and bottom border
- Second value applies to right and left border
For example:
HTML with CSS Code
<!DOCTYPE html> <html> <head> <style> p {border-style: solid; border-color: chocolate; padding: 16px;} p#a {border-width: 10px 20px 30px 40px;} p#b {border-width: 10px 20px 30px;} p#c {border-width: 10px 20px;} p#d {border-width: 10px;} </style> </head> <body> <p id="a">This is para one.</p> <p id="b">This is para two.</p> <p id="c">This is para three.</p> <p id="d">This is para four.</p> </body> </html>
Output
This is para one.
This is para two.
This is para three.
This is para four.
The border-width with four values is used to define following four properties at once:
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