Mermaid style custom made gown

Selling my custom made gown that was unfortunately made way too big for me. The gown doesn’t have a size on the inside but I took measurements of the Garment Size: 19 inch bust 17 inch waist 21 inch hips 57 inch length ***this is just garment size not body size*** I did put on the dress so it would give a better idea of how it looks on I’m currently a size 10/12 in dresses my guess would be that this gown would fit more like a size 14 but I’m not 100% sure. The gown has never been worn it is in great condition the only thing is the sash by the bust on one side needs to be sewn down because it lifted other than that very minor issue the gown is in great condition. There is a bow on the back that is removable it is attached by three buttons and can be added or removed!