I can't find the product tag, so I don't know the size or fabric, but it's a thin, soft fabric that feels like linen. In my subjective opinion, it feels like a size M. The zipper on the back opens to about the waist. It comes with a matching fabric string at the waist. I think it would be cute tied in the front or the back. Length: Approximately 110cm Bust: Approximately 80cm