Although there are no tags, this item has only been tried on and stored at home. The neckline is square, with rhinestones around it. I think it would also be good as an inner layer for a jacket. The manufacturer's size is M, but it's slim, so I think it's suitable for a size S. Please refer to the measurements. Width under the armpits: 37cm Length: 50cm Measurements are taken by a layman, so please allow for some error. If you have any questions, please feel free to comment.