CSS border-width definition

Syntax

border-width: thin | medium | thick | <length> {1,4}

The border-width property specifies the width of the border of a table.

Values	Definition
thin	Sets a thin border.
medium	Default. Sets a thin border.
thick	Sets a thick border.
length<unit>	For example: 5px. The unit can be any of px (pixels), mm (millimeters), cm(centimeters), in (inches), pt (points), pc (picas), em (the element's font height) or ex (the element's x-height).