Here's a "D"

I'm a "D"
You can compare and make your own opinion

If your unhappy with so called "c"s how bout a set of "D"s

*wink*

There can be a large variance in breast size, while all being true; while the cup size may stay the same, as the band size goes up, the volume of the breasts will generally increase.

For example, a 40D will be larger than a 32D, even though both are D cups.

I hope this helps!

...is determined primarily by the difference in circumference measure at the greatest point of the breasts and that measured just below the breasts, which supports Alexandra's comment.  Most guys are unaware of that fact and instead base their opinions on some sort of qualitative assessment of breast volume.