Why Are My Boxes Too Large for My Products?

How it happens

Nobody decides to ship air. It accumulates, usually through one of four routes.

1. Nearest available. A product launched, nothing fitted exactly, and the next size up was used 'for now'.
2. Product changed, box did not. A redesign made the item smaller and the packaging was never revisited.
3. The exception became the rule. A larger size was added for an unusual order and became the default because it always works.
4. Consolidation went too far. Sizes were removed to simplify the bench, and the remaining ones are too big for most orders.

Measuring the problem

Fill ratio is the metric: product volume divided by carton internal volume, for the formats carrying most of your orders.

Reading fill ratio.

Allow for genuine protection - a fragile item needs space around it. What it does not need is unstructured space that gets filled at the bench.

What it is costing

• Material - board area you did not need, on every unit.
• Fill - something has to occupy the gap, on every order.
• Bench time - applying that fill, on every order.
• Carriage - volumetric weight calculated on the external dimensions.
• Damage - more room for the product to travel in.
• Storage - larger flat-packed cartons take more space.

Six costs from one decision, all recurring. See packaging review and cost reduction.

Fixing it without creating new problems

There are three honest routes and the right one depends on your volumes and how many sizes you already hold.

1. Add a better-fitting stock rung - cheapest to do, but every extra size costs bench space, stock and a decision per order.
2. Re-specify to a made-to-size carton for the high-volume groups - removes the gap entirely. See bespoke carton manufacture.
3. Change format - a book wrap or wrap-around removes depth rather than width, which is often the dimension costing a band. See postal and parcel packaging.

The wrong route is to keep the box and add more fill, which addresses the rattle and none of the cost.

Designing the ladder rather than growing it

The durable fix is to stop adding sizes reactively and design the set deliberately.

1. Plot SKUs by their largest dimension and by order volume.
2. Look for natural clusters rather than spacing sizes evenly.
3. Place rungs so their external dimensions sit inside carrier bands.
4. Validate against your top 20 SKUs by volume before committing.
5. Remove the rungs that carry almost nothing.

See packaging for fulfilment.

A useful discipline going forward

Make 'what does it ship in' part of launching a product rather than something settled afterwards by whoever packs the first order.

It costs nothing at that point and it prevents the slow accumulation that produces an eleven-size ladder three years later.

The short version

• Ladders grow reactively: nearest available, product changed, exception became default.
• Fill ratio is the metric - below two thirds deserves a look.
• One oversized box costs in six places, all recurring.
• Adding fill addresses the rattle and none of the cost.
• Make packaging part of launching a product, not an afterthought.

Frequently asked questions