While free supplies cannot be used across every shipping class, the postal service still offers one of the most generous packaging programs of any global carrier. Understanding how to use the catalog keeps operational expenses low while staying completely compliant.
Anyone with an account on the USPS website can submit Postal Store online orders for packing products. The agency delivers these supplies directly to residential addresses and commercial warehouses with zero shipping charges. Shippers can order packs of 10 or 25 units across multiple formats:
- Small, medium, and large boxes, alongside specialized apparel and board-game boxes tailored for odd dimensions.
- Non-Flat Rate Priority Cartons: Rectangular and side-loading boxes designated as "Priority Mail" (not Flat Rate), which allow shipping items by exact weight and distance zone.
- Bubble Mailers and Padded Envelopes: Heavy-duty, water-resistant Priority Mail padded envelopes, which remain a favorite among apparel and electronics sellers.
- Priority Mail Express Supplies: Specialized rigid envelopes, padded sleeves, and distinct boxes reserved for guaranteed overnight delivery.
- Mailing Labels and Customs Forms: Peel-and-stick customs document pouches, address labels, and fragile handling stickers.
- A dedicated bundle containing two Priority Mail APO/FPO flat rate boxes, two medium flat rate boxes, Priority Mail tape, address labels, and customs form envelopes designed specifically for sending goods to service personnel overseas.
The primary limitation remains USPS Ground Advantage. When the postal service merged First-Class Package Service, Parcel Select Ground, and Ground Returns into the unified Ground Advantage umbrella, it deliberately chose not to manufacture free, dedicated packaging for the service. Ground Advantage targets budget-conscious commerce, so shippers must supply their own plain boxes, poly mailers, or recycled packaging.
