The <hr> tag

The horizontal rule is used to subdive your web page - to break it into visible sections

The attributes

align          left center or right
               example: <hr align="center">

width          use a number of pixels or a percentage
               example: <hr align="center" width="75%" >

noshade        make the line appear 2D rather than 3D

size           in pixels, sets the thickness of the line

This example:
<hr align="center" width="50%" size="5">

Will be displayed as:

And this example:
<hr align="left" width="25%" size="5" noshade>

Will be displayed as: