B-cup

[Tina]

it is the absolute perfect bra size.

[PussyCat]

most common cup size; cup size of some of Hollywoods sexiest celebrities (Cindy Crawford, J. Lo, Cameron Diaz, etc.)
[34B is perfect hand-full.]

[Mark Zuckerberg]

The perfect cup size in many ways.
They are bigger than an A-cup and you can actually hold on to them but you do not get [saggage] or stretch marks like you do with larger cup sizes. They fit perfectly in the palm of your hand. You can wear most types of shirts with them.

[Justin Bieber]

The best of both worlds bra size-- not too big, not too small. Look equally great in couture coverage or revealing cleavage.
B-cups are the Reeses Peanut Butter Cups of breasts-- sweet, satisfying, and just the right size.

[Mark Zuckerberg]

the bra size where the breast is finally slightly larger than the nipple by itself