Vintage 80s polka dot fit and flare midi dress

Super cute vintage 80s midi dress in navy and white polka dot. Unlined semi-sheer top with double breasted buttons, fully lined fit and flare skirt. Elasticized waist with a fun detachable matching belt. In great condition, no visible flaws. No fabric tag but feels like a poly rayon blend. No size tag but best fits XS to small. Measurements: Pit to pit: 16” Waist (unstretched): 10” Waist can stretch up to 14” Total length: 41”