Would best fit a size US 4. 
Material has some give because it’s 100% silk chiffon. Close fit and a zipper closure with padded cups. 
The straps have some wear as does the lining of the dress which does not affect wearability and is not visible when worn. There’s a few missing beads here and there which are not visible when worn either. 
30-33 inches around armpits 
25-27.5 inches around waist
57 inches long