Hi Shloime, Simply change the ul element's width property within the CSS. Here is a link to the CSS which, when added to the base Superfish CSS file, creates a vertical-style menu... http://users.tpg.com.au/j_birch/plugins/superfish/css/superfish-vertical.css ...the very first rule contains width:10em which is the width you want to change. Also note further down there is left:10em which controls the offset of subsequent levels of menu, so you need to alter that to the same value as you use for the main menu width.
Joel Birch.