Rogue Sleeveless Striped Tank Top Corset Back Button Front Ruffle Hem - No Size

Rogue Sleeveless Striped Tank Top Corset Back Button Front Ruffle Hem No size tag or fabric content tag - based on the pit to pit measurement, I believe this is a medium or large. The corset back allows the torso to be adjusted. However the shoulder straps are not adjustable. Fabric feels similar to linen but not sure what it is. Features embroidery on the shoulder straps and along the top of the blouse. Also has a spare button on the inside seam. Condition is Preowned. No holes but there are two blue stains that did not come out with stain treatment. One is near the bottom of the top and the other is near the top button. Please review photos for appearance and approximate flat measurements