Measure your boobs, people! :p My bras never fit right. But I just now thought of figuring this out the right way. D’oh!
Also, it’s important to keep in mind that not all D cups are the same size (or A, B, C, E, F, etc).
Hope I can get time to try on new bras. My boobs are crying. They’re really not. Just the mental image was too fun to leave out.