You’re wearing the wrong bra

Believe it or not, the bra you wear can instantly make you look taller, thinner, and younger – or not, says Karen Phillips, account development team leader at an online retailer. Wearing the wrong bra isn’t just uncomfortable (as basically anyone who’s ever sat through a workday with her bra straps digging into her shoulder can attest) – it can also affect the way your clothes fit and inadvertently cause you to slouch, both of which instantly age you more than ten years. Look for a seamless style with moulded cups that will hug your curves and lie flat under clothes.
You’re a fan of chunky jewellery

While big, chunky pieces can give off a bohemian look, they also become outdated quickly. For a younger vibe, Phillips recommends reaching for simple cuff bracelets, thin hoop earrings, a tennis bracelet, or thin chain necklaces.
You’re obsessed with trends

Trends come and go, so if that’s all you’re buying, you’ll soon be left with an outdated wardrobe full of clothes and shoes that make you look behind the times. However, that doesn’t mean you can’t ever buy something trendy like leopard-print shoes. Phillips says, “With so many trends around, I’d ask myself a few questions before investing: does the item make me happy? How many times a week will I wear this?”
Read on for the fashion rules you should know by the time you’re 40.