I am a 36AA ( i think ), and UK size 16, so even though i am flat chested, im quite big, so i dought the extra small for AA cup will be the right size(?) so Im thinking of getting the small, and also the medium cups. Do you use the same pump for each cup size? and also is there a general packadge that u can buy? ( like in the picture on the website, which also shows vitamin E lotion ) or do i need to buy the small cups with the pump and the medium cups then separate? thanks for the help, just really aprehensive about buying it over the net and getting it right!!