I am a Victoria's Secret size 34D.  I ordered a size small.  This bra is more of a yoga bra or sports bra type it fit in the breasts. I found it to be very giving and stretchy in the cups and unforgiving in the band around. The band was too tight but I think if I go up a size the cups will be too giving and not supportive.  Unfortunately, way too tight around so have to return