width: 16em !important;
Create a file named
userstyle.css, as above, and place it in the
conf/ directory. It will work with the dokuwiki template and various other templates. If you need a wider toc, change 16 to 18. If this doesn't work tell us what template you are using. Afer inserting this in
conf, clear your browser cache, then go to your configuration options and click on save.