First time I wore it, I felt like my ribcage was crushing. Then I left the bra alone for like 2 months, tried it on again one day and it fit a lot better. I don't know if it's from not being washed, or because I lost some weight. Perhaps a combination. You will have to stretch it out a little or even go up a size.
This bra is really pretty, but again it's super tight at first. If you are more comfortable with a bra a little bit looser, go up a band size, since the cups are kinda small too.