My 38A breasts are the same size after surgery. What kind of procedure would make them bigger? (Photo)

Success is defined by your satisfaction with the procedure.  Of course by definition your breasts must be larger since you have implants.   They may not be large enough to make you happy though.  375 cc is a modest implant and perhaps you had something bigger in mind.  You need to try sizers on to have a good idea of what you would consider a success.  The only way to get your breasts larger is to have larger implants put in.  Not even sure what the plastic surgeon means by expansion.  $8575 is expensive for a breast augmentation.  You should talk to the plastic surgeon who did the procedure about switching your implants out for larger ones.  They should be willing to do this for less than if you had another surgeon perform the revision. 

If you want to be bigger, than bigger implants will do that, but I would recommend you wait a minimum of 3-4 months to allow for stretching to get your final result. Compare photos from pre-op to 3 months post-op, and you will see a difference.

375cc implants should have made some difference. I would suggest you ask your operating surgeon to put your before/after pics side by side so you can better see the difference. If you still want to go bigger, I would suggest waiting a good 6 months to a year before proceeding with larger implants. This will give your breast tissue enough time to have stretched some more so your breast pocket can accommodate a larger implant. Good luck!