Sherry from the New Zealand sewing blog, Pattern Scissors Cloth, created a clearly written tutorial on making tailored jacket sleeve plackets. We’re all about the mitred corners and buttonholes, and although she notes that one does not need to make the buttonholes functional by cutting them open, we believe that you should go for full-on luxurious ostentatiousness and hand sew your vent buttonholes in imported silk buttonhole twist.