Can I go larger after reconstruction following mastectomy?

From your description and photos it appears you can most likely have a significant improvement with revision reconstructions and upsizing your implants. This is fairly straight forward surgery. Consult with your plastic surgeon or another board certified plastic surgeon with experience in all aspects of aesthetic and reconstructive breast surgery. Best of luck to you. There is indeed hope. 

Hi and thanks for your question,
Your breast reconstruction appearance is not an uncommon one following radiotherapy to one side - the radiation always causes a tighter, smaller reconstruction and the skin is usually a little more resistant to being stretched by the expander.
I do not think that going bigger is going to be a straightforward undertaking. One option would be several series of fat grafting sessions to try and increase the size and improve the shape of the right breast reconstruction to more closely match the left side.
If you want to increase the size of both breasts, then I'm afraid you would need to consider removing the implants, replacing them with tissue expanders and expanding the skin up to a point where they could then accomodate larger silicone implants.
Another option to consider would be to replace your implants with abdominal tissue in the form of TRAM/ DIEP flaps - these usually provide a good amount of tissue for reasonably sized breasts as long as you have enough abdomen to consider as an option.
Best thing to do going forward is to discuss these options with your PS and in particular what you want to achieve with your breast reconstruction.

When you have that much history of breast surgery and radiation, there are lots of opportunities for problems. If your skin is soft and mobile, that is better, and if you breasts seem empty, there may be room for more volume. As always, a visit to a board certified plastic surgeon who has enthusiasm for breast reconstruction will be necessary to determine your best course. I hope it goes well for you.