Excellent!

Needed a wider admin sidebar, so this plugin is perfect for that. Here’s the CSS I used:

#adminmenuback, #adminmenuwrap, #adminmenu, #adminmenu .wp-submenu {
    width: 200px;
}
#wpcontent, #wpfooter {
    margin-left: 220px;
}
#adminmenu .wp-submenu {
    left: 201px;
}
#adminmenu li.wp-not-current-submenu .wp-menu-arrow {
    transform: translate(200px);
}

Thanks,

js.