Provide font names and font sizes, border radii

These are really great so far, but I'm finding it a little frustrating having to guess at font sizes and border radii, when the real concepts to learn are the properties in question.

I think if you were to provide the font sizes, families, etc in comments, without indicating how they're applied, it could prevent some undue frustration.

Can provide a PR if you'd like.

Thanks again for this great resource.