Wedding gown

This dress was bought on the sale rack at a boutique, I had delicate sleeves added to give an off the shoulder look. It has beautiful beadwork and rusching that is very flattering. The back zips but has buttons over it, so it looks like it buttons up. The only alterations were to the sleeves, and the bust was taken in a little. I bought it in a rush because my future father in law was sick but we were unable to have our wedding in time, so I decided to go with a different dress. This has only been worn for fittings and to be tried on. I am 5'7 and weigh about 170 lbs. it says it is a size 16 but it runs very small. I'd say it is more like a size 8 or 10. My normal dress size is M/L and the wedding dress I decided to go with is a size 8.