I have this summer dress ordered in size S / M. The size is perfect for me (1.73 m, with slim Cup size A / B), the dress fits superbly. For women with significantly more bust the dress is rather not geeinget because it does not stretch the chest and different expected as optical, under the "wrinkled" chest part is still a layer of smooth material.
Another note: the dress must be ironed decent definitely as the substance tends leash similar to wrinkling.