Font size CSS

What is the standard “font” size in wordpress 2.5.1 ?

Here is my new blog http://www.mcbidz.com/blog

While editing in Microsoft Word I dumped it back on the editor in my blog and got a larger font somehow. When I went to my CSS in my cpanel to see what the font was so I could change it and drop it back in this is what I saw below so I changed it to “Ariel 11pt”, but its still showing up much larger than the post I get directly from my editor (not using “word” to edit). I posted a “test” post at the top directly from my wordpress software so you can see the size it post directly. The post below the “test” has all been changed to “Ariel 11pt” using “WORD” so you can see the difference.

Is this the correct place in the CSS to edit the body font content ?

body
{
font-family:Arial, Helvetica, sans-serif;
font-weight:normal;
font-size:11px;
color:#000000;
background: url(‘images/bg1.gif’) top center repeat-x #ffffff;