Custom SOS paper bags allow customers to adjust the classic self-opening sack format to specific products, portion sizes, counter workflows, and branding requirements. At Lanfon Hwakon, we develop custom SOS paper bags by modifying width, side gusset, height, paper appearance, printed areas, and packing configuration according to the intended application. They can be designed for bakery items, snacks, grocery goods, takeaway products, café food, and other suitable uses. A narrow format may work well for small bakery products, while wider or deeper custom SOS paper bags can better accommodate multiple items or larger food portions. We consider the way the bag stands during filling, how staff load products, how customers carry it, and how the finished package is stored before use. This allows the structure to be developed around actual operating conditions instead of forcing customers to accept standard stock dimensions.