I work at a medical office where speed is essential when pumping. I got this bra to avoid having to put on and take off the bustier-style pumping bra I already had every time I pumped. I agree with other reviews that say this bra is not very supportive. I'm currently a 34DDD and the small size fits, but would not be enough by itself. It also gives you a bit of a "uniboob" look and a kind of strange visual contour to your breasts. However, I have found that it works great underneath my more flattering and more supportive underwire nursing bras. I wear both together at work and when I pump, I take down the regular nursing bra and then fit the flanges into this one. It holds the flanges well, even with full 8oz bottles, and it saves me time. So I'm happy, and it's a keeper.