For an online retailer the packaging decision that moves the most money is the box ladder - how many sizes you carry and how closely they fit. Too few and every order ships air and pays a volumetric surcharge; too many and the bench slows down and packers choose wrong.
Three jobs at once
Ecommerce packaging is judged on protection, on carriage cost and on brand, and most packs are chosen for only one of those. It has to survive a parcel network that handles each item many times, sit inside a carrier band rather than just outside one, and carry whatever impression the brand makes after the sale.
Those are not in conflict as often as people assume. A right-sized pack is usually cheaper to send, uses less fill, protects better because the product cannot move, and looks more considered. Oversizing is the single decision that damages all three at once.
Building the ladder from the order profile
The ladder should come out of what your orders actually contain, not what your catalogue holds. Those are different documents. Take a month of real orders, group them by shape rather than by product, and specify a format for each major group plus one fallback.
| Shallow ladder | Deep ladder | |
|---|---|---|
| Fit | Poor - most orders ship air | Close |
| Carriage | Higher - volumetric surcharges | Lower |
| Void fill use | High | Low |
| Pick faces and stock | Few | Many |
| Decision at the bench | Simple | Slower, more errors |
| Peak performance | Fast but wasteful | Error-prone under pressure |
Depth of ladder: the real trade-off.
Most sellers land on a small number of well-chosen sizes rather than either extreme, and find that the right number is lower than they expected once it is built from orders rather than products.
The letterbox threshold
For small flat items, whether the pack fits through a letterbox is frequently worth more than every other packaging decision combined. A pack that goes through the door avoids a delivery attempt, a card and a redelivery - all of which cost far more than the mailer.
It needs measuring rather than assuming, because the depth limit is strict and a pack that is a few millimetres over gets no benefit at all. See Postal Boxes and Mailers: Which Format to Use.
Returns are part of the pack
- On any line with a meaningful return rate, a pack the customer cannot reseal guarantees the product comes back in something worse.
- A resealable closure costs very little against a returned item that is no longer sellable.
- A supplied returns pack is better still where the product is fragile or valuable.
- The condition goods come back in is a packaging metric, and most sellers never look at it.
- See returns management for the receiving side.
Peak is a different specification
A pack that takes forty-five seconds to assemble is fine in February and a genuine constraint in November. At peak the bench is the bottleneck and temporary staff are building the pack, so the one that survives is the one that is hard to get wrong rather than the one that is theoretically optimal.
That usually means fewer components and a shallower ladder for the season, accepting a little more air in exchange for throughput and accuracy - see Packaging for a Seasonal Peak.
Brand, and where to spend it
The outer is the only physical thing most online customers ever handle, which makes it the cheapest brand touchpoint a business has. Where to spend is a question of setup economics: printed tape brands every carton size for one setup, printed cartons brand one size each.
For most sellers the sequence is printed tape first, then printed inner wrap or tissue if the unboxing matters, then printed cartons only once the range is settled - see Printed Tape vs Printed Boxes: Which Earns Its Place.
What to send us
A month of real orders if you can, or at least the order profile: items per order, size and weight spread, and the seasonal shape. Plus your current pack range and a sample of carrier invoices, because the band distribution is where the oversizing shows up as money.
See ecommerce packaging for the service and packaging for fulfilment where the packing is done for you.
A first step for online retailers
Two documents answer most of the question: a month of orders and a month of carrier invoices.
- Group the orders by shape rather than product, and see how few shapes cover most despatches.
- Count how many despatches sit just over a band threshold on the carrier invoices. That number is recoverable.
- Measure the empty volume in ten typical packs. Above a third, the ladder is the problem.
- Check whether your highest-return line has a resealable pack.
- Time a pack build. If it is over about half a minute, peak will be painful - see Packaging for a Seasonal Peak.
The short version
- The box ladder is the decision that moves the most money.
- Build it from the order profile, not the product catalogue.
- Letterbox depth can outweigh every other packaging decision on small flat items.
- A pack the customer cannot reseal guarantees worse returns.
- At peak, simplify - the bench is the constraint, not the materials.
Frequently asked questions
How many box sizes should an online retailer carry?
Fewer than most expect, chosen from the actual order profile. A small number of well-fitted sizes beats both a single universal box and a deep ladder nobody can pick from quickly under pressure.
Is letterbox packaging worth it?
For small flat items it is frequently the largest single saving available, because it avoids a failed delivery and a redelivery. The depth limit is strict, so measure rather than assume.
Does branded packaging actually pay?
It is the cheapest brand touchpoint in ecommerce, since the outer is the only physical thing the customer handles. Start with printed tape, which brands every size for one setup - see Printed Tape vs Printed Boxes: Which Earns Its Place.
How do we reduce carriage cost through packaging?
Right-size the pack and check the band distribution on your carrier invoices. Volumetric charging means air is charged as goods, so oversizing is paid on every despatch.
Should the pack change at peak?
Usually it should get simpler. Fewer components and a shallower ladder lose a little on fit and gain a great deal on throughput and error rate.