Size medium is very stretchy and can fit many sizes, I'd say a size 6 to a 12. Very flattering and comfortable, doesn't wrinkle, can be dressed up or down. Very flattering at the chest. I felt that it minimized my large chest.

I love this dress but it's very form fitting. I have pretty big hips and it just did not work with my body type. The fabric is lovely and very stretchy and comfortable, I wanted it so much to not show off my bum bum but it did very much so and I cannot wear it...BOO