There's a perceived stuffiness to the waistcoat these days, equating them more with cartoon tycoons than modern office types. This season, however, the classic three-piece suit - now slimmer, sharper and better co-ordinated - reads more Wall Street than Rich Uncle Pennybags. Rest assured that either way, though, you'll look like a million bucks.
1) Make your look modern by matching your waistcoat to the rest of the suit, as was done at Dolce & Gabbana's runway show (above left). In other words, wear a contrasting colour only if your workplace is the set of a historical drama.
2) Opt for a V-shaped neckline on the waistcoat for a more flattering effect. As a rule, remember that the lower the V, the slimmer the waist will appear.
3) Pinstripes are always classic, but if your corporate culture skews less formal, opt for softer fabrics such as tweed or wool. You'll still look dapper - just more relaxed.