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CSS•CSS Foundations

CSS Border Width

Overview

Formula

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;
}

Result:

Formula

5px border - width medium border - width
2px border - width thick border - width

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 {

Formula

border - style:
solid;
border-width: 20px 5px; /* 20px top and bottom, 5px on the sides */
}
p.three {
border-style: solid;

Formula

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

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CSS Borders

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CSS Border Color