Most Helpful Guy
If you're only 16, your boob size should be the least of your worries as they'll grow as you grow and gain weight. A 30C isn't small and your boobs are way, way less important than you think as after initial attracting any guy your boobs are of no importance.
Most Helpful Girl
That's quite small it's the same cup volume as a 32B or 34A. It really depends on how the rest of you is. Like if you are showing bones then a 30C will look much bigger on you than someone who has a big belly