Prom dress size small. Authentic Mary's prom dress

Authentic Mary's prom dress I bought this at a high end boutique in Sacramento for prom and didn't end up going due to an emergency. Its still brand new with tags. Original price was 159$. Super cute short in length and corsets all the way down the back. It's currently not corseted all the way down because it was hard to get on so I left it undone so I could try it on and take it off. Could fit a wide range of sizes due to the adjustable corset back. I'm a size small