[BonitaDDs]

definitely xxl I use them and I'm quite average size female my chest above boobs is quite boney depth isn't important it just gives room to pump I don't know why but Lucy seems to try to sell smaller sizes probably so you grow out sooner she recommends me a large which is ridiculously narrow xl is still tiny and painful to use as it crushed and fold yes like pinch my breast into xl not expand my breast like my xxl I get great swelling you can still pump slow with a bigger cups
I think Lucy say too much negative pressure to stick thing what? much better too wide than to narrow its impossible to pump too narrow you only need to be able to suck in a tiny depth of flesh all the way around cup opening to seal the suction
with bigger cups place them just under bust and up over hold in place until seal is made by suction I find it easier to pump one brest first by squeezing he tube to other shut then when hat one has good seal squeeze that tube shut to keep suction the pump the other cup on until sealed then you can pump both and they stay on.

one good thing about Lucy is if she tells you to buy wrong size she will exchange or just ship you the bigger set free noogleberry shipping is good and fast