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
Formatted code
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;
}Live preview
Expected output
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
Formatted code
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 */
}Live preview