Widget font size

It is impossible to know what is needed without being able to view your site. Please post a link to a page where the problem can be seen and someone might be able to help.

Here it is: https://conciergeconnections.com.au

I’m sorry but as you are using a commercial theme, you need to seek support from the theme’s vendors.
https://www.elegantthemes.com/forum/

In the meantime, try using Firefox with the Firebug add-on for this kind of CSS work.
https://getfirebug.com/