How to edit React icon size?

[ArieLevental]

Hey,
I know there is a size prop <IconUsersGroup size={48} />,
but I don't like to add props and prefer to use CSS to apply global style.
Seems like adding a classname <IconUsersGroup className="navigation-icon" />,
and adding CSS style like so .navigation-icon { size: 2rem; } won't work.

What is the right practice / methods for this?

Thanks <3