CSS Border Width

The border-width property specifies the width of the four borders.

The width can be set as a specific size (in px, pt, cm, em, etc) or by using one of the three pre-defined values: thin, medium, or thick:

Example

Demonstration of the different border widths:

p.one {

 border-style: solid;

 border-width: 5px;

}


p.two {

 border-style: solid;

  border-width: medium;

}


p.three {

 border-style: dotted;

  border-width: 2px;

}


p.four {

 border-style: dotted;

  border-width: thick;

}

Specific Side Widths

The border-width property can have from one to four values (for the top border, right border, bottom border, and the left border):

Example

p.one {

 border-style: solid;

 border-width: 5px 20px; /* 5px top and bottom, 20px on the sides */

}


p.two {

 border-style: solid;

 border-width: 20px 5px; /* 20px top and bottom, 5px on the sides */

}


p.three {

 border-style: solid;

 border-width: 25px 10px 4px 35px; /* 25px top, 10px right, 4px bottom and 35px left */

}