CSS border-left-width definition

Syntax

border-left-width: medium | thin | thick | <length>

The border-left-width property specifies the width of the left border.

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).