Will a Tummy tuck give the appearance of a bigger bust size?

A tummy tuck will not make your breasts larger or smaller. However when one body area is changed it can impact the appearance/illusion that an adjacent area is different. So yes, theoretically having a smaller, flatter abdomen may give the illusion that the bust is larger.

Dear Erica,A tummy tuck flattens the abdominal region and does narrow the waist.  This does make the breasts appear larger.  Ideally, a breast augmentation would be done to enhance the breasts even more.  Plastic surgeons will often do the two procedures together.Please seek a board certified plastic surgeon for a consultation.  This will best determine if a tummy tuck surgery will fulfill your goals.Aloha,Shim Ching, MD

There is a relative enhancement of breast profile after a tummy tuck, even if the breasts are not changed.  This is due to the smaller waist and flatter abdomen.  Similarly, breast augmentation can make the midsection appear relatively smaller as another illusion.  Imagine, when patients choose to do both together, the magic hourglass shape appears.  Do seek consultation with board certified plastic surgeons to answer all you questions in more detail.