I used the beach bustier pattern from Mrs. Depew Vintage, one I had fallen in love with after seeing Tasha's version. I made the size small (34 inch bust), and I'm pretty happy with the fit without making any alterations. My actual measurement is 35, and I wear a C cup and the fit is almost perfect. Generally patterns like this tend to fit best on smaller cup sizes, but having read Tasha's review I figured this one would be just about right. This pattern would be great for anyone with a smaller band size and larger cup, probably best fitting a C or D cup, something that's fairly hard to find with vintage patterns in my experience. I interfaced the front of the lining pieces to give the top a little more structure because I wanted to be comfortable wearing it without a bra. I also added boning just at the center front, which I attached to the lining, in order to help keep the front sitting straight when worn.
I should have set the straps in at an angle, but wasn't really thinking, and I'm actually considering making them convertible, so I can wear it either as a halter or cross-back. I'd use small buttons inside the back band and buttonholes in the ends of the ties. They sit flat in front if the straps are arranged that way, and it doesn't show quite so much when it's on me and not the mannequin. I'm really looking forward to getting the other pieces finished and having so many new separates to mix and match with the rest of my wardrobe!