If your order has not shipped we can change the size for you without issue. Just send an email about what plugs need to be changed and what size you need to change them toPlease include your order number with your emailIf your order has already shipped, you will need to return it to us so we can process the exchange. Please refer to the "Return Questions" portion of our FAQ page.For any other questions or concerns please email support@plugyourholes.com