How to change blog-description font size?

Hopefully you are using Custom CSS? Try this:

#blog-description {
   styles;
}

# is an id . is a class

Thank you. That did it!

I believe I am using the custom CSS as opposed to the theme style.css. I understanding not to edit the main files and use the “custom CSS” but there are several entries areas for this and I’m confused on their purpose. i.e.
Appearance>Editor – this has the main theme pages I believe – and avoid editing these.
These two options below are confusing as to which to use. I believe 1 is built in by WP and 2 is built by the theme I use – custom community. When I enter css in one it doesn’t show in the other so this is not accessing the same file. What are they and which should I use?
1. Appearance>Edit CSS
2. Appearance>theme Settings>Theme CSS tab

Number 1 sounds like it’s from a plugin named Jetpack, which also has Custom CSS functionality.
Number 2 sounds like it’s Custom CSS functionality that is built into your theme.

Either would work here.

Thank you!