Believe it or not, Victoria's Secret has one I am in LOVE with!! It has adjustable clasps underneath the arms so you can snug it to your rib cage!! This is GREAT for when you have a smaller rib cage but need more cup room! And a 34 is teeny tiny!
Otherwise, if I get one that fits the cups, it is too loose around the rib cage. I get one that fits around the rib cage and the cups are way too small and I end up....well, let's not go there!! Let's just say I end up putting it back on the sales rack!;-)