No. 6 Store Black Cotton Dress With Ruffled Sides. Flowy, loose fit, sleeveless with ruffles going up both sides for shape and movement. Has pockets. Midi length. Unmarked size, fits anywhere from Medium to Large due to style. Good used condition, incredibly slight discoloration under the arm. not noticeable when worn--sold as is. 

Approx. Measurements:

Length: 38"

Underarm to underarm: 22"