14 Dec A Tip on Getting Your Waistcoat Right
Buy it as part of a suit. Or one that came as an option for a suit, at least. This way you can guarantee it will have a high quality of tailoring (rather than mass production) and it gives you the option of going all out three-piece if you want to at a later date.
The other nice thing about buying a waistcoat this way is that they often come with lapels of their own, which when worn without a jacket can add a really nice formal touch to a look.