adjust font-size of text for menu sub-items

how can i adjust the font-size of text for menu sub-items?

some of my sub-items are long, so they wrap. i'm trying to keep each item on one line, so i need to reduce font size.

thanks

 

I have checked your site http://manasterlaw.com/

I didn't get any issues with the menu-sub items.

 

Please can you just tell me, how do I adjust the font size? Thanks