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:

Output :

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

Output :

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