Size XS but could easily fit a small due to shape. This dress is absolutely stunning. I got so many compliments when I wore it and felt incredible in it. Where silk is concerned, silk charmeuse with a bias-cut is best. This gorgeous maxi showcases both with spectacular drape and soft, shimmering sheen that is right for just about any occasion. COLUMN FIT: Expertly cut for a straight fit - no waist definition. Crew neck with button-loop closure at back. Unlined. BE CAREFUL WITH THIS ONE