Hey sweetie for me personally I think 450cc is really nice Chucky size ive had this 2nd time round so anyway 400v 450cc not much different but only by 50cc which is 50g or 50 ml there are 150cc per cup size so you will be the same cup size but the 50cc just a little bit more fuller if your unsure now that’s b4 your op I would go bk and ask wot is the most you can have if over wot u have in mind go for it if can’t its worth a try for peace of mind as bobbie greed isn’t nice at all xx