Im 15, im a size 32C in bra's, is this good? Or are they too small?

Hey people, Im 15, im 5ft 9 and I weigh 8st. Im slim and I have natural blonde hair. I am in a modelling agency but I always thought my were small, and it made me self-concious. Im a size 32C in bra's. Is this a good size, or do lads prefer bigger?