Whats a good way to set the font size of a PopupMenu in relation to gui size- must it be a custom laf?

I’ve got a popup menu, and depending on current GUI size, I’d like to set the font size for the text in that menu. juce::PopupMenu::Options options;
I can’t see a font size setting in those Options docs.

What’s your approach to setting font sizes of menu depending on gui size? Do I have to do a custom laf?