Anniversary band?

That''s a pretty big difference to size down.  How are the diamonds currently set?  Prongs, channel, etc?

Channel.  Thanks for the help!!

Doubtful.

I wear a small size and ask that question a lot about certain rings. that''s a pretty big jump and with channel set diamonds you can''t reshape the ring that much or they will get out of line. I''m thinking no, not a good idea.

Agree,  Not a good idea!

If it were a half size or a size, I''ve had that done on a channel set ring with no problem.  But to go from an 8 to a 4.5....no way jose.  Never gonna happen!!!!