Backless black dress

This is a dress but it shrank in the wash so it's really short and could work as a shirt also. I'm pretty tall though so I think it would work a lot better on someone shorter with shorter legs! I think it's a medium but it runs small. It's really light material and super comfortable. It could work as a bathing suit cover up as well. I spent a lot of money on this dress so I'm trying to get back as much as I can!