Lady Rose's braid trimmed blouse in Downton Abbey looks easy to emulate. Unlike many of the elaborate costumes worn by the cast here is a blouse idea that could be copied using a plain long sleeved pullover blouse as the base.  If your blouse does not have a square neckline you will have to cut a square neckline in front and finish the edge with a hand-rolled hem. as seen in the close-up picture above. Then hand stitch or machine stitch braid or ribbons in similar colors as seen on Lady Rose above and you have wearable Downton Style!