Do I HAVE to wear my bra size?

I have the same problem, I am very skinny but a size 30HH! I now buy all my bras from Bravissimo.com. They do gorgeous bras in all sorts of colours and patterns and since then I have bought their bras and only their bras. Try Freya ones, they're for teenagers and beautiful. Bravissimo.com is the way to go for a bigger bust!!