Sincerely Jules pink satin-ish bustier-type cropped top

This Sincerely Jules bustier top, perfect for layering under a blazer for a sexy look, has never been worn. I bought it thinking it would fit and it was too small, despite it being a medium. It is a small medium, cropped and fits snugly. It is more like an extra small with a bit of stress in the back. I hastily pulled the tags off before trying and threw them out. Hence, this is why I can't return and have decided to sell.