We don't recommend having our products worked on by outside jewelers as this voids any potential for refund or replacement (should a defect develop due to their work).  This includes resizing or any type of repair work.  Although we do not offer any repair or resizing service, if your Maral Kunst piece is defective and covered under the warranty, please send your order number and a photo of the defective piece to contact@maralkunst.com !