Diane von Furstenberg 100% silk wrap dress. Size- small?Dark green and turquoise

Diane von Furstenberg 100% silk wrap dress. Size -small? Dark green and turquoise. Inside loop and button to secure fit, then signature small string ties for wrap closure. Beautiful seams and 7.5” splits at base for movement and style 2 rear off center sides, 2 front off center). Dry clean. Note- stain, see quarter pic. It hides under the cross over flap by chest area when lying flat. Didn’t dry clean to see if it comes out. Measures- think it’s roughly a size small Across chest, pit seam to seam, with the inside button closed 20”. It can be more since it’s a wrap style close Shoulder down to bottom 43”