Weight Fluctuations and Rings

One of the things people worry about during the holiday season is weight gain. Yes, tis the season to be merry and jolly, but then after the holidays, you see all the diet commericals on t.v. So how does this tie together with jewelry? If someone's weight fluctuates all the time, the rings they wear can become too tight or too loose and having rings resized can be very costly. An alternative would be to have a jeweler build a ring guard within the shank that can then be adjusted by the wearer so that the ring fits them properly.