Nina Austin's night gown has never been worn

I purchased this elegant night gown for me to attend my brother's wedding; however, when it arrived I was out of the country and missed the return shipping date. I have never worn this beauty and the reason being it's sizing. I am S and although the dress indicates S, it is too big on me. I think, it would be more fitting for an M sized lady. I am selling it for a bit chipper as I torn the tag away. Will bargain 🙂