Main Menu Font Size

Hi,

I’ve added two new fonts:

style.css

@font-face {
	font-family: Financier;
	src: url('/wp-content/themes/enfold-child/fonts/FinancierTextWeb-Regular.eot') format("ttf"),
         url('/wp-content/themes/enfold-child/fonts/FinancierTextWeb-Regular.woff') format("woff"), /* Modern Browsers */
         url('/wp-content/themes/enfold-child/fonts/FinancierTextWeb-Regular.woff2') format("woff2"); /* Modern Browsers */
  font-weight: normal;
  font-style: normal;
}

@font-face {
	font-family: Metric;
	src: url('/wp-content/themes/enfold-child/fonts/MetricWeb-Regular.eot') format("ttf"),
         url('/wp-content/themes/enfold-child/fonts/MetricWeb-Regular.woff') format("woff"), /* Modern Browsers */
         url('/wp-content/themes/enfold-child/fonts/MetricWeb-Regular.woff2') format("woff2"); /* Modern Browsers */
  font-weight: normal;
  font-style: normal;
}

function.php

// BEGIN Font Drowpdown in Theme Options
add_filter( 'avf_google_heading_font',  'avia_add_heading_font');
function avia_add_heading_font($fonts)
{
$fonts['Financier'] = 'Financier';
$fonts['Metric'] = 'Metric';
return $fonts;
}

add_filter( 'avf_google_content_font',  'avia_add_content_font');
function avia_add_content_font($fonts)
{
$fonts['Financier'] = 'Financier';
$fonts['Metric'] = 'Metric';
return $fonts;
}

That worked so well so far. My problem now is that I can’t adjust the font size of the main menu (see Printscreen).

Can you help me, please?
Thank you very much.

Best regards,
Esther