Any page that uses avitars will need to be edited if you want to edit the sizes out, if you look at the URL of a page you're on you can see what template needs edited.
Example:
https://www.ubbcentral.com/forums/ubbthreads.php/ubb/[b]showflat[/b]/Number/174285/page/1/gonew/1#UNREAD
This page I'm on is showflat, thus the template is showflat.tmp; or you can just leave the max size fields unset in the controlpanel...