I was fairly sure my bra size was 38-F, & the Delimira tee-shirt bra in 38-F fits me PERFECTLY. The molded contour cups are made from thin foam, with no padding. It's nice for the summer, but still thick enough for modesty (you won't have to worry about nipples showing through :P) The shape of the bra works for both tee-shirts & low cut tops, & the straps are thin enough for tank tops. It's not amazing quality, but it's a lot better than the price suggests. The construction seems sturdy & comfortable, & it's fairly supportive. I plan to get this bra in more colors, & I highly recommend it :D