[syddos]

You need to check the class="name" for the text you wish to change, search for the same name in the CSS file and change it.

If the class name applies to other text you do not want to change, create a unique class name for the text you wish to change, then create a new CSS style(font size, colour etc) using the new class name.

You can also use inline style, example
<td style="font:Arial, Helvetica, sans-serif; font-size:10px; color:#FFFFFF">your text</td>

or
<font face="Arial, Helvetica, sans-serif" color="#FFFFFF" size="1">your text</font>

or
When you have created your NEW CSS style...

<td class="name_of_your_CSS_style">your text</td>.

If you do not select a font x-cart default font will be used.