A packaging system for high flexibility and speed box-last packaging comprises one or more dimensional scanning sensors that are configured to scan a group of one or more target products that are to be boxed and gather dimension information describing physical dimensions of the group of one or more target products. The system also comprises one or more packaging-production machines that are configured to generate custom-made packaging templates that conform to a pre-determined set of packaging template types. Additionally, the system comprises a packaging template buffer that comprises physically divided sections that contain multiple packaging templates selected from the pre-determined set of packaging template types that are generated by the one or more packaging-production machines. Each of the packaging templates are organized within the physically divided section based upon packaging template type.