Womens Ivory Silk Blouse, Sleeveless Shell, Button in Back, Size 10

Gorgeous and classy dark ivory sleeveless top or shell. A little button at the top in back. Looks and feels like silk to me but there are no contents tags. There is no designer label either but there is a little tag with a 10 on it which I assume is the size. Do see measurements below though. Excellent preowned condition. No issues to note. Measurements laid flat and pulled taut. armpit to armpit across bust all round: 42" waist: 42" length shoulder to bottom hem: 23" Size: 10