Anthropologie Wedding/Formal Dress

One shoulder wedding dress/formal gown from Anthropologie. Purchased on sale for $75. Tags still attached, never worn. So beautiful, just doesn’t fit! I’m holding the excess fabric behind me in the photo; I’m about a size small or medium based on the chart, and 5’10. Needs to be properly cleaned; some minor staining on the neckline and some staining on the bottom from being on the rack. Has a little bit of a train on me, maybe a couple inches.