This is such a beautiful shirt! for me, tts. i bought the size 4 (34b) it is a very detailed and tailored shirt so i can understand if your busty why you may have to size up. the attention to detail along with the embroidered butterflies sets this shirt a step above average. the color is an odd shade of olive but i like it and the butterflies have areas that you can see through but not in an im-modest way. i do not feel the need to wear anything under it.