Would best fit a size US 2. 
Purple and blue layered. Has beading details all over including the hem of the sash. The outer layer is silk chiffon. Has a zipper closure with boning on the sides of the bodice. Bias cut and close fit. Padding on the bust. 
Excellent gently used vintage condition.  
31 inches around armpits 
25 inches around waist 
60.5-61 inches long from shoulder to hem