size="+2"??

SPECIFY THE RELATIVE FONT SIZE. <font size="+n"> or <font size="-n">.
Basically, you are specifying how many sizes larger or how many sizes smaller than the preset font size.
Font size="-2"
Font size="-1"
Font size="+1"
Font size="+2"
Font size="+3"
Font size="+4"
This is the default size for this font.....now I can change the size with
<font size="+3">to make it larger, </font> or
<font size="-2">to make it smaller </font>
http://www. 这个上面有介绍，不过都是英文的，呵呵。。