Top Sleevless Black Ribbing Down Front. Size M-L

Top black sleeveless in light airy fabric, round neck. Not sure of the make and size. I must have removed the label!! I bought this blouse a number of years ago from a boutique in San Francisco. It wears beautifully and does not wrinkle. Please check the measurements carefully. Not sure of fabric content but comfortable to wear and material breathes. In very good preowned condition. Approximate Measurements Armpit to Armpit 19” Length 23”