Thank you for your quick reply. I found the CSS to edit from your post, but putting in the font size didn't change anything. Here's the code - I added "font-size

x-small" in 3 locations, and none of them made any difference:
/**
* Top menu main block styling
*/
.navbar-inverse {
background-color: #44596f;
border-color: #44596f;
font-size

x-small;
}
.navbar-inverse .navbar-nav > li > a:hover,
.navbar-inverse .navbar-nav > li > a:focus {
color: #ffffff;
background-color: #44596f;
font-size

x-small;
}
.navbar-inverse .navbar-nav > .active > a,
.navbar-inverse .navbar-nav > .active > a:hover,
.navbar-inverse .navbar-nav > .active > a:focus {
color: #ffffff;
background-color: #44596f;
font-size

x-small;
}
/**