It depends how carefully they where removed, if they used a ring cutter and only had 1 go at it then it should not be too bad
If they had a few slips or used pliers then the shank can get quite damaged
The price depends on what carat gold, thickness and colour
Also it’s usually prudent to wait a good few weeks to let any swelling go down else you may be making them smaller again in 6 weeks
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