The defining piece, it should fit snugly but comfortably, ending just at the top of your trouser waistband. It adds warmth and keeps your shirt tucked in, ensuring a polished appearance even after removing the jacket.

Keep accessories subtle, as the three-piece ensemble is already quite bold. The Three Piece Suit: The Nr. 1 Staple Of Formal Fashion

For a more modern or "dandy" look, you can mix in a contrasting waistcoat. Tips for Wearing a 3-Piece Suit