Anyway, my boyfriend got me a promise ring, but it was too small so we sent it off to get resized but now I'm dieting can you get a ring resized twice? It was a 7 and it's going up to a 9. I know they go up or down 2 sizes but if it's already been done can they make it go back again?
The jeweler would really be the one to ask, because it might depend on the style of the ring, although I know resizing down is usually easier than resizing up, so I think the odds are in your favor that it can be resized down.
My Etsy shop (currently closed for the summer)
It should be fine, they really should be able to do that for you. However, I have been warned to wait to get my own engagement ring resized, because it can be bad for the ring itself if it goes through the process too many times.