Would 30 cc be an extremely noticeable difference? (photo)

Asymmetric breasts are usually corrected with implants of different sizes and sometimes, implants with differences in shape.  For most patients with noticeable asymmetry, 50 - 75 cc at a minimum is often required to give appropriate symmetry.  Doctors usually position patients in a sitting position during breast surgical procedures to test implant sizes and evaluate symmetry.  30cc is only one ounce, and is unlikely to correct really noticeable asymmetry.

If you think about 30cc is about an one tenth a can of soda spread out over a large surface area so the idea that it would be visible does not make much sense. I tell everyone who has obvious asymmetry that there is no way to make them perfect and that is never the goal. If you are unhappy you need to speak with you surgeon but perfect symmetry is impossible

30 cc's won't cause a huge difference in breast size following an augmentation unless you started off with really small breasts prior to surgery.  If your left breast feels firm or you are experiencing pain, you may be developing capsular contracture in the left breast.  Or, if your implants are different profiles, that may also lead to different breast shapes.  Other causes include hematoma, seroma, implant rupture and malposition.

Thirty cc's is not that much of a difference. If you have a revision procedure and the only thing that is done is that 30 cc''s are added, I don't think that you will notice much of a change. It would be nice to know if your implants have been changing over time. If the left implant appears to be getting smaller with time and firmer, there is a good chance that a capsular contracture is the cause of the size asymmetry. If the left side has been smaller since the first week after surgery, then it could be that you need a bigger implant. The only reason that one implant would need to be bigger is if the breasts were different sizes before surgery. If they were not notably different in size before surgery, you need to make sure that you don't have a capsular contracture.

There appears to be more than 30 cc of difference. Without seeing before photos it is hard to comment on the choice of implants. If indeed the size difference was small, I would have some concern about a fluid collection around the right implant causing the size discrepancy.  If there is another procedure upcoming, I suspect a new implant of a larger size will be needed for symmetry. All the best.