Hi,
The simplest way to do this is to add your style rule to the CSS selection block for the .ModuleEditLink class. Example:
a.ModuleEditLink,
a.ModuleEditLink:link,
a.ModuleEditLink:visited,
a.ModuleEditLink:hover,
a.ModuleEditLink:active { font-size:10px; text-decoration: none; }
HTH,
Joe D.