There is a 12 month warranty on all my pieces. If there is a manufacturing default (NOT wear and tear) I will repair your piece for you asap! If for some reason it is irreparable you can receive a refund.
If you buy the wrong size I can re-size the ring for a fee. This will also depend on how much of a difference between sizes. If it is a vast difference it may not be possible without compromising the structure of the ring. Please note that some styles of rings cannot be resized so make sure you find out the correct ring size before ordering!