I am perhaps in the minority with this opinion, but I absolutely love this Coats & Clark ad from the September 1961 edition of McCalls magazine. The reason is two-fold. the color scheme is so sixties. And . . . I’m obsessed with knowing sewing. That is to say, I’ve been interested in making things all of my life, but it is just recently that I have begun the quest to learn as much as possible about sewing. Case in point. It’s important to use the right thread and needles for your project.
This handy chart is a bit outdated. For example, machine needle sizing is different today and the fabrics listed are a bit limiting. However, it does a great job of making their point. Success requires the right combination of needles and thread.