Size, width, and color attributes of horizontal rules.
Size attribute; affects the size (thickness) of the horizontal rule; measured in pixels; default size is hr size=2 <hr size="0">
<hr size="3">
<hr size="5">
Width attribute; affects the width (length) of the horizontal rule; measured in pixels <hr width="75">
Color attribute; affects the color of the horizontal rule; default color is gray <hr color="#781738">
Noshade; makes the horizontal rule a solid, filled in line <hr size="5" noshade>