éThis tankini top has a built in soft cup bra for support and mess lining to avoid retaining water. The swimsuit fits well throughout 3 trimesters and post-partum. To select your size you should order your pre-pregnancy size as we have taken weight gain during pregnancy into consideration. Pre-pregnancy size 0-2 is XS, 4-6 is size small, 8-10 is medium, 12-14 is large, 16-18 is XL. Your current bra size is also a good indicator. 32-34B,C,Dsize XS, 34-36B,C,Dsize S, 36-38B,C,Dsize M, 38-40B,C,Dsize L, 40-42B,C,DXL.é