The oversized blazer has become the go to layer for anyone who wants tailoring without the stiffness. Its wider shoulders and longer body give it a relaxed, confident look, and it works over almost anything. The key is that it should look intentionally large, not simply too big. That comes down to a few details. The shoulder seam should sit just past your natural shoulder, the sleeves should fall to the wrist or slightly beyond and the lapels should be crisp. Fabric is important. A wool blend or crepe has enough weight to hang well, while a lighter linen mix suits warmer days. Check the buttons, the lining and the stitching for signs of quality. Colors like charcoal, camel, chocolate and black are the safest choices, while stripes, checks and tweeds bring more personality. If you can only buy one, a double breasted style in a neutral tone offers the most range across seasons.

The oversized blazer is easiest to wear when you balance the volume. Pair it with slim or straight trousers for a clean line, or with a fitted knit and a mini skirt to show off your legs. It looks great with wide leg jeans and a tee for weekends, and over a slip dress with pointed shoes for an evening out. Push the sleeves up slightly to show a wrist and a watch, and try tucking the front of your top for shape. Belting it at the waist creates a jacket dress effect that feels polished and fresh. Layer a turtleneck underneath for extra warmth as the weather cools. Keep your bags structured and your shoes clean. To look after it, hang it on a wide hanger, steam out wrinkles instead of pressing them and dry clean only when it truly needs it, since too much cleaning can dull the fabric.