hi bettie ..i had the kangzhu large cups for about 2yrs. they had little silicon rings and were contoured ..i liked that but i have to say the quality of materials was not the best ..not at all. a couple of months ago, i finally broke down and got the large contoured noogleberry breast pumps. i didn't get the silicon rings, i thought i would, i was afraid they would be too uncomfortable but really, they aren't as uncomfortable as i imagined they might be ...i still might get them at some point, though. as far as the contoured base, i kinda like that but you absolutely have to rotate them before you pump until their contour fits your chest wall and they seal. i'm glad i got the contoured. i mean, i think i am. i really don't know what the non-contoured would be like. the quality of materials and valves are really good and the large contoured noogs seem a little bit bigger than the large kangzhu's. pricier but i should have gotten these in the first place.
oh, i almost forgot ..my underbust is 31-32", breast measures about 38-39". i'm 5'8. when i got these noogleberry large pumps on, my breast sides still touch the inner wall near the base but there's this little thing that i do that i'm quite fond of ..i heat up a little oil mixture, stand at my stove with burner on medium, massage with oil while occasionally heating my palms over the burner. then, i have a small bottle of aloe vera gel i keep refrigerated. i pour about a teaspoon in my hand and rub all over the breast area, especially where the base will be, put the cups on, rotate, pump and then, this is the part i love. i have these big, fat rubber bands, i slip a couple, sometimes three over both cups and since the aloe vera gel is kinda slippery, the rubber bands pull the cups together till they touch. sometimes, i have to pump a bit more so they don't pull the cups right off my chest and what i've found is they are filling my breasts out toward my sternum which really appeals to me cuz, it seems i've already got plenty of breast at my sides. i'm really most happy about this in particular. it works for me ..so, this may give you a little bit of context for deciding medium or large ...but, if you do the little paper thing that karren said to do and the large will work for you, definitely get the large. you don't want your breast all squished against the wall of the cups ..you need expansion.
oh, i almost forgot ..my underbust is 31-32", breast measures about 38-39". i'm 5'8. when i got these noogleberry large pumps on, my breast sides still touch the inner wall near the base but there's this little thing that i do that i'm quite fond of ..i heat up a little oil mixture, stand at my stove with burner on medium, massage with oil while occasionally heating my palms over the burner. then, i have a small bottle of aloe vera gel i keep refrigerated. i pour about a teaspoon in my hand and rub all over the breast area, especially where the base will be, put the cups on, rotate, pump and then, this is the part i love. i have these big, fat rubber bands, i slip a couple, sometimes three over both cups and since the aloe vera gel is kinda slippery, the rubber bands pull the cups together till they touch. sometimes, i have to pump a bit more so they don't pull the cups right off my chest and what i've found is they are filling my breasts out toward my sternum which really appeals to me cuz, it seems i've already got plenty of breast at my sides. i'm really most happy about this in particular. it works for me ..so, this may give you a little bit of context for deciding medium or large ...but, if you do the little paper thing that karren said to do and the large will work for you, definitely get the large. you don't want your breast all squished against the wall of the cups ..you need expansion.