That's a pretty big jump. Sometimes they are able to scoop out some of the metal on the inside of the band, but that's usually to make the ring 1/4 size bigger, not a full size. I would doubt it could be done, but I'm sure an expert will jump in here and tell you for sure. It might help if you describe the band. Is it channel set, prong set, etc? Good luck.
No, probably not. The inside of the band may be able to be shaved a bit, but I don''t think a whole size. But I would show it to a jeweler if you want a 100% answer.
is that a tacori? i don''t think they can be sized at all. too much risk to damaging the scalloped sides along with the pave on the top of the band. i wouldn''t risk it. You can always call tacori or a dealer to be sure.
Send it to the maker of the ring, they may be able to swap you for the larger size if the ring is new. That ring will be a nightmare for anyone else to size, although it could possibly be done by adding in a section of plain metal at the bottom, although the likely hood of breaking one or more stones during the sizing is high.
To size it so that it looks as it looks now is very difficult and will cost as much if not much more, than simply going back to the original vendor and paying for the larger finger size in the ring that is made to that size. This is NOT a practical ring to size in my opinion.