I have been looking for strapless bras to wear under my wedding dress.  I've tried on at least a dozen different kinds, without any clear winners, and most just not doing the job.  I ordered this from Amazon, it arrived really quickly, and fit PERFECTLY the minute I put it on.  I couldn't believe it, it made me feel like I have never had a bra that fit this well, not to mention a strapless!  The reason it is so good is because it actually pulls into your body at the top, keeping the full breast in place. Most strapless bras I have tried don't provide support at the top (or the sides) leaving things a little to jiggly for me. The weight is nicely distributed through the band of the bra, giving full support without the straps (it comes with removeable ones).  If you are in between sizes, I would go for the one higher up so you can enjoy a well fitting bra.  Love it, will have to order another!