Vouchers can be used for the sizes listed on your voucher, or anything smaller. You won't be able to use your voucher for a different type of product, however. If the original file that you uploaded does not work for the size you selected, we recommend choosing an alternative image. If you decide to select a smaller size instead, please note that unused portions of your voucher's value are forfeited and we will not be able to issue a refund for the difference in product cost.