Upgrade image posted 15 January 2014 from Google Art Project via Wikimedia; increased temperature, contrast, and exposure.
This higher quality image shows the Marchesa Balbi's dress has very long hanging brocade and matching full (instead of tight) false sleeves over a dress of dark green material decorated with parallel bands of gilt trim down the center front and hem. Her ruff is trimmed with patterned dots rather than conventional lace.
Keywords: 1625, van Dyck, Marquise, Balbi family, Italian, high enclosing neckline, neckline ruff, headdress, hanging sleeves, false sleeves, cuffs, tabbed bodice, basque bodice, full skirt, fan