Uh...it is 300 x 200. It's not online at the moment though because it is a little bit personal. Anyway, here is the part of the code that is relevant. I just posted the basics since, like I said, the other stuff is pretty personal.
<table align="center" border="0" cellpadding="0" cellspacing="0" height="100%" width="100%">
<tr align="center">
<td>
<div style="position: relative; top: 0; left: 0; z-index: 1;">
<table align="center" background="me-and-you.png" border="0" cellpadding="0" cellspacing="0" height="200" width="300">
<tr align="center">
<td></td>
</tr>
</table>
<div style="position: absolute; top: 0; left: 0; height: 200px; width: 300px; z-index: 2;">
<img src="foreground.png" style="margin: 0; padding: 0; height: 200px; width: 300px;">
</div>
</div>
</td>
</tr>
</table>
I know that is not the typical way to center something in the middle of a page, but it's worked for me forever. I'd prefer not to worry about changing that part. I was just hoping to know how to center foreground.png.
Thank you!