Buying bras online is a bit of an adventure.  Buying a strapless is even more scary.  I tried this one on the advice of my daughter and ordered two sizes.  With Amazon's free return on clothing, I was able to return easily if they didn't work.  The bra is a good design and stays up well thanks to the grippy strips on both edges of the band.  I kept the one that fit best and returned the other.  The price was also great.  A surprising success story!