Bundle of two dresses casual blue black white

Both gently used and no size, fabric or brand tags. The black one is a bit stretchy and unlined, the blue one is lined In The skirt only overlay not stretchy. From someone who wears a S, but since size tags removed please check measurements. Black and white one is 17 inches pit to pit unstretched and approx 33 inches long, blue one is around 38 inches long and pit to pit approx 18