Reduce sub-menu font size?

I need to figure out how to reduce the font on the sub-menus only of the site I’m building? Not the main navigation menu…I increased the font size of that. I want the Services menu font to be smaller so the page titles don’t break down a line. They are long page names. I cannot find this in the CSS style sheet html?

Development site is

Thank you so much!


add the following css into your theme style.css:

.menu-item ul.sub-menu a {
    font-size: 14px !important;

14px you can set as you need.