Adjusting banner size Options

[lovelymissphoebe]

Hey! My banner code is

<!-- begin code provided by createblog.com --><br /><img src="http://i8.photobucket.com/albums/a30/lovelymissphoebe/GilderoyValentines.jpg" alt="Image hosted by Photobucket.com"><br /><!-- end code provided by createblog.com -->

that, and I'd like to know how to make it smaller. I did recentely have a code, but I don't think it worked properly. Could somebody tell me what I could add to my code to adjust it a bit? Thanks!