Stella McCartney - This navy velvet blazer is a sublime example of Stella Mccartney's considered approach to tailoring. It's shaped for a slim fit with a single-breasted button fastening and notch lapels, alongside a double vent to flatter the lower back. Coordinating twill lining ensures a clean drape. Style it with a white shirt and wide-leg trousers for a subtle play on proportions.