Freya Response: We usually suggest going down in the band and up in the cup in this style, so 28DD should be the correct size⦠always remembering to bring the breast tissue forward into the cups as this can make or break the fit. However if this style is still not working for you, perhaps you would like to try our Fantasie 2222, or Fantasie 2132 in your usual size 30D. Sara from US