Fonts

<font size=size face=fontname color=#rrggbb >...</FONT>

Font size

Absolute font sizes 
<font size=1>1</font>
<font size=2>2</font>
<font size=3>3</font>
<font size=4>4</font>
<font size=5>5</font>
<font size=6>6</font>
<font size=7>7</font>
  1 2 3 4 5 6 7
Mixing 
Starting with the default font 
<font size=5>incr,</FONT>
<font size=7>ease,</FONT>
R
<font size=6>e</FONT>
<font size=5>d</FONT>
<font size=4>u</FONT>
<font size=3>c</FONT>
<font size=2>e</FONT>
Starting with the default font increase,Reduce

Fonts can be mixed.

relative to basefont
By changing the size from a number to an increment.decrement the resulting font size is relative to the basefont. 
<font size=+2>
  2 sizes larger than basefont
</FONT>
<font size=-2>
  2 sizes smaller than basefont
</FONT>
2 sizes larger than basefont
2 sizes smaller than basefont

face

<FONT FACE="font list" SIZE="3">...</FONT>
You can make use of any true type font. However there is no guarantee that the client browser has any of these fonts.