Im 5’5 9st and had 375hp unders on tuesday, i honestly think go bigger if youre having unders babe, I let the surgeon decide for me on the day as right up until the day i was down for 350s. Im only just filling a D cup sports bra now from 34A and now the swellings starting to go they dont look big at all! Its so hard to tell because ive seen girls who have had the exact same implant as me end up as an E cup! Good luck with your op, theres really not much inbetween them from what my PC said to me when i tried sizes. xxx