HTML > BODY > DIV#site-wrap > DIV#main-container > HEADER#site-header > DIV.inside.logo-and-nav > DIV.nav-holder > DIV.main-nav > UL.main-menu > LI.depth-0 > A.link.link-depth-0 > SPAN {
       font-size: 17px; 
    } 

HTML > BODY > DIV#site-wrap > HEADER#site-header > DIV.inside.logo-and-nav > DIV.nav-holder > DIV.main-nav > UL.main-menu > LI.depth-0 > A.link.link-depth-0 > SPAN {
       font-size: 18px; 
    }