The pattern is the Natalie top by Liola Patterns. It is available on the Indie Sew website.
I bought this fabric in the summer on my fabric expedition into Toronto. I knew I wanted to make this top with it but I wanted to make another version first before I cut into this fabric. So I made a wearable muslin out of this blue fabric. I do wear this one but it wrinkles horribly quickly. The next one I made was this green one. You can read about it here. I made the green one tunic length but over the winter I cut it off and hemmed it to be the same length as these ones.
For this version I cut a medium. I shortened the opening at the top by 1 inch. I also added some darts in the back to help with the fit.