BCBG Simone off shoulder cocktail dress- new

brand new w tags. I just got it out of the closer hoping to wear this year to a party but I don't think it fits me right Gorgeous dress! so upset it doesn't fit me I find it fits more like a 10 as all my other dresses are 8 or 10 from here. the reason for the 12 for me was the chest size. I wear a 36d and wanted to be comfortable