A Trusted Friend in a Complicated World

15 Fashion Rules You Should Know by the Time You’re 40

Updated on Sep. 11, 2024

Fashion should be fun at every age—and with these tips, you’ll look better than ever.

Our editors and experts handpick every product we feature. We may earn a commission from your purchases.
Learn more.

Now Trending

Portait of a confident businesswoman in a modern office buildingWestend61/Getty Images

Coco Chanel was great at reminding us that age is just a number. “The age of a woman is not important: You can be wonderful in your 20s, amazing in your 40s, and stay fabulous for the rest of your life,” the iconic designer is quoted saying. Fashion can help us do that at any age, though the rules change slightly as we get older. That said, those rules aren’t about avoiding certain things when we’re no longer in our 20s or 30s. They’re about knowing how to maximize our look—something that’s also true when it comes to makeup.

With that in mind, we’ve assembled the 15 best fashion tips to help you play up your best assets during your fourth decade. From well-fitting undergarments to smart silhouettes, here is your cheat sheet for looking great at 40 and beyond. After you check out these suggestions, learn the style secrets of women who always look put together.