Okay, so a while back I posted that as much as I liked the look of Kat's zimarra and used it as the inspiration for mine I hadn't seen any examples of a short puff sleeve on a loose gown.
Look what I found today while browsing the Portrait of the Month archives at The Realm of Venus.
Domenico Riccio (Il Brusasorci), before 1567: Portrait of a Lady
Off the change those elbow length sleeves now. :D