If you accidentally purchased the wrong size or color, there's nothing we can do. However, if your necklace or bracelet is too small, You can purchase extra links from us and take the item to a local jeweler who can extend it. If your necklace or bracelet is too big, you can take it to a local jeweler and they can shorten it. If your ring does not fit, you can take it to a local jeweler for resizing.