I am planning in just wearing this bra all day so I don't need to switch back and forth at work to pump, but it is not very comfortable and looks bad under tighter clothes. Luckily I wear scrubs so that shouldn't be a problem. It adjusts to fit many sizes! I usually wear a size 38DD and the XS/SM/MED fits great with room to spare. I would definitely recommend this to anyone looking to pump hands free. Should work with all pumps (i have a medela)