How to change List Box header/title Font type and size?

Hi,

I see that there is still no functionality in K2 5 designer for a simple thing like adjusting the Title font size or type.

Can anyone please suggest some code that will adjust the List Box Header/title font size?

I tried the method i've used for List Views :

<script type="text/javascript">$(document).ready(function(){ $('.grid-column-header-text').css({'font-size' : '12px','font-family' : 'arial'});});</script> and literal ticked, with the data lavel inside the table, but it's not working on a List Box

Any ideas K2 Maestro's?