Start with the item, not a box collection
Group the things you actually send by size, fragility, and handling needs. Measure a few packed examples before buying a large quantity of supplies. A small range of suitable sizes can be easier to store and use than many boxes that do not fit your products.
Keep packaging and shipping services separate
Some carrier-branded supplies are intended for specific services. Read the markings and the supplier’s product conditions. Free or supplied packaging should not be treated as universally interchangeable plain packaging, and the price of a box is not the postage price.
Choose protection for the contents
Plan how the item will be wrapped, separated, and prevented from moving. Fragile or unusual contents may need special packaging. Ask the carrier for item-specific guidance rather than relying on a generic “fragile” label to provide protection.
Prepare a repeatable packing station
Keep suitable tape, labels, a scale, and a measuring tool together. Record the finished parcel’s weight and dimensions. Put the packing instructions beside the supplies so another person can reproduce the process without guessing.
Test before buying in bulk
Pack a representative item and check fit, closure, label placement, and the resulting carrier quote. Keep photographs for your records. Revisit the box choice when products or cushioning change, because the finished parcel can change too.
Open the related shipping tool →
Related guides and tools
Continue with the resources that match the next step for your shipment.
- How to pack a parcel
- Parcel size and dimensional-weight calculator
- USPS flat-rate boxes: packaging, postage, and choosing a box
Further reading
Updated October 31, 2026. Read the current official guidance for your route before shipping.