The Vienna Vest is such a versatile ite; it can be worn by itself or over dresses. It does run a bit oversized.
 
98% Cotton, 2% Spandex
 
Model Info:
-Typically wears size Medium in Tops, wearing size Small
-Height 5'5"
-Cup size 34C
 
Length 21 3/4" | Chest (Armfit to Armfit) 35" in size S