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Breast Augmentation 550cc Implanted Increased 1 Cup Size? Will they Grow as They Settle?

hi, i had a breast augmentation 11 days ago, i was a 38B and i wanted to increase to a 38D or DD, my surgeon implanted 500cc in my left and 550cc in my right (under the muscle), he said he wasnt happy going above 500 as it can cause complications. my sports bra they fitted me into is a C cup, im disapointed as i have only increased by 1 cup size. Can i expect them to still grow as they settle? or will they shrink due to the fluid still inside there? i am 5foot 9, i weigh 16stones thank you

Doctor Answers (5)

Time to Settle


Cup size is not a reliable measurement as it changes from company to company, and even within the same line on a regular basis. As you are only 11 days out, you will need time to determine whether you are getting the look that you desired.

West Palm Beach Plastic Surgeon
4.5 out of 5 stars 14 reviews

Breast Cup Size after Breast Augmentation?


Thank you for the question and pictures.

Your situation demonstrates why discussing cup sizes  when it comes to communicating goals for breast augmentation surgery can be confusing and a source of miscommunication/disappointment.

Generally speaking, 550 mL breast implants should not increase your breast size from a "B" to a "C" cup. It would be much more likely that you have been measured incorrectly or are simply using a different bra style or manufacturer.

Given that your only weeks out from the surgery, I would suggest that you give yourself at least several more months to get used to the breast size physically and psychologically.  Hopefully you will be pleased at that point; make sure you do not base your level of satisfaction on a specific cup size.


Believe it or not, many patients feel that their breasts appear “larger” once breast implants have fully settled.

Best wishes.

Web reference:

San Diego Plastic Surgeon
5.0 out of 5 stars 627 reviews

Implants and cup size


First, cup size and implant size do not always correlate, but I would focus on how they look and not so much what bra cup one fits into.

Manhattan Plastic Surgeon
4.5 out of 5 stars 14 reviews

Don't trust the sports bra


There's just no reasonable way that a 550 implant would only increase you by just one cup size.

What has probably happened is that the C cup sports bra is just very stretchy, and still manages to fit, even though you are really larger. If you were really a 38B, and got 550 cc, I would certainly expect your final size to easily be a D/DD.


Don't panic.  Let the tissues heal and relax.  Then go get sized properly.

Orlando Plastic Surgeon
5.0 out of 5 stars 19 reviews

Breast size after 550 ml size implants


I am most surprised that your increass in size was only 1 cup size with 550 implants. It makes me think you were or are wearing the wrong size bras. 550 ml implnasts shoud increase our size at least 2 cup sizes. They will not grow with time unless you gain weight. Thy may even get smaller with the subsiding of the swelling.

Savannah Plastic Surgeon
5.0 out of 5 stars 27 reviews

These answers are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.