I'm a little late in replying. I personally don't believe in the add 4 method, it's outdated,but I know a lot of ladies here prefer that. If you use the add no inches method you would be a 30D, a 30DD if the bra you measured with is unpadded. Try one on if you ever have the chance, I know they're rare but you might be very surprised at how much better it fits. D cup doesn't necessarily mean bigger, it's all relative to the band size. Also, I don't think that's flat chested at all! It's very proportionate!
This chart shows sister sizes you could wear, sizes in the same colour have the same cup volume, but a different shape. So a 30D is the same size as a 34B, but on a smaller frame.
![[Image: bra-sister-sizes.png]](http://csoasd.files.wordpress.com/2012/10/bra-sister-sizes.png)
Hope I could help!
(By the way, the CC measurements that aren't in bold are inaccurate.)
This chart shows sister sizes you could wear, sizes in the same colour have the same cup volume, but a different shape. So a 30D is the same size as a 34B, but on a smaller frame.
Hope I could help!
(By the way, the CC measurements that aren't in bold are inaccurate.)