For printed materials, the optimal point size when choosing a font for print is between 10-12 points, however legibility can vary between typefaces.
How to Choose Right Typography for Your Project, by UIDesignz
How To Choose A Font — A Step-By-Step Guide! — Smashing Magazine
Page templates - fonts - Engaging Networks Support
How to Choose the Best Font for Print: Tips for Book Covers & More
Typography Basics For Print On Demand - CustomCat
What are the font sizes used in a magazine? - Quora
The Art of Typography: Tips for Choosing Fonts for Your Printed Projects
5 Rules: The Science of Choosing a Font
What are the font sizes used in a magazine? - Quora
Choosing a Font for Print
How To Choose The Best Fonts For Print Designs - Kimp
Hand Lettering: Choosing Your Fonts - Amy Latta Creations