We get a fair amount of requests in the shop for waistcoats, usually for the customer's partner and this pattern offers a great solution. Knitted in King Cole Big Value Super Chunky Tints, a thick yarn means that you need not fear the sweater curse (breaking up before you finish the garment for your beloved). If your beau is a little more reserved I would suggest using King Cole Stormy Super Chunky which has a lovely subtle marl of colours and deep jewel tones to fit any gender.
You will need 8mm and 10mm needles for this project. King Cole suggests that you might need an 8mm circular needle to pick up the ribbing on the cardigan - I would suggest purchasing both sizes of in circular needles and using them to knit flat rather than the straight needles.