I want to change the font size in moomenu submenus



<div class="hornavmenu">

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<ul class="menu" id="moomenu">

<li class="item-101"><a href="/" >Startseite</a></li><li class="item-112 deeper parent"><a href="/termine.html" >Termine</a><ul><li class="item-116"><a href="/termine/probenkalender.html" >Probenkalender</a></li></ul></li><li class="item-113 active deeper parent"><a href="/ueber-uns.html" >Über uns</a><ul><li class="item-117"><a href="/ueber-uns/historie.html" >Historie</a></li><li class="item-118 current active"><a href="/ueber-uns/faq.html" >Häufig gestellte Fragen</a></li></ul></li><li class="item-114"><a href="/" >Kontakt</a></li></ul>

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<div class="clear"></div>

I'd like to show the "Historie" and "Häufig gestellte Fragen" bigger, is there a way to change it?
Thank you very much.
Solluh