Hi Mike,

Thanks for reaching out to us.

You can use custom CSS to adjust the size of the Font Awesome icons in your mega menu. Try adding this to your CSS file or custom CSS section:

body.ltr .sp-megamenu-parent > li.sp-has-child > a:after, 
body.ltr .sp-megamenu-parent > li.sp-has-child > span:after,
.sp-dropdown-inner ul.sp-mega-group li a span:before{
    font-size: 14px; // Change font size based on your needs.
}

Check this documentation for adding custom css: https://www.joomshaper.com/documentation/helix-framework/custom-code-css-js-meta

Let me know if you need any more help!

Best Regards,