The question of whether to buy stock (off-the-shelf) or custom (made-to-order) packaging comes up constantly, particularly for growing businesses that started with stock sizes and are now spending enough on packaging to wonder if there's a better way.
The honest answer: both have their place. The mistake is using stock packaging when custom would pay for itself, or ordering custom when your volumes don't justify the cost.
What Stock Packaging Is
Stock packaging means buying standard sizes from a distributor's catalogue — usually in boxes of 25, 50 or 100. The sizes are set. The board grade is fixed (usually a standard C flute). You pay a premium per unit but you have no tooling or minimum order commitment.
Stock packaging is right when:
- Your volumes are low (under a few hundred boxes per month)
- You have variable product dimensions and need several sizes
- You're in a startup phase and don't know yet what sizes you'll need long-term
- You need fast replenishment and can't manage lead times
The main disadvantage of stock packaging beyond cost is dimensional inefficiency. Standard stock sizes were designed to cover a range of products adequately, not to fit any specific product well. You often end up with boxes that are 30–40% larger than they need to be, which means more void fill, more weight, higher shipping costs and worse use of pallet space.
What Custom Packaging Is
Custom (bespoke or made-to-measure) packaging means specifying the exact dimensions you need, the board grade, and any print or converting requirements. It's manufactured to order in agreed run quantities.
Custom packaging is right when:
- You have sufficient volume to justify minimum order quantities (typically 500–1,000 units minimum for plain corrugated, higher for printed)
- Your product dimensions are consistent and unlikely to change soon
- Dimensional efficiency matters — in e-commerce, right-sized packaging directly affects shipping zone costs
- You want any branding on the outer packaging
The cost per unit for custom plain corrugated (unprinted) can be similar to or even lower than stock once you're ordering in decent volumes, because you're not paying the distributor's margin and you're not over-specifying board grade.
The Calculation to Do
For any product you're regularly shipping, work out:
- The most efficient stock box size for your product (the smallest one that fits with appropriate product protection)
- What the ideal custom size would be based on your actual product dimensions
- The difference in cubic volume between the two
Then multiply the volumetric difference by your monthly shipment volume. If your stock box uses 30% more volume than an ideal custom size, and you're sending 500 units a month, that extra cubic capacity adds up across void fill materials, shipping costs and pallet utilisation.
For e-commerce businesses using dimensional weight pricing, the calculation is particularly clear. A box that moves your parcel into a larger DIM weight bracket adds a direct, quantifiable cost on every shipment.
Getting Quotes
When getting quotes for custom corrugated, provide exact internal dimensions (length × width × depth), the product weight, a description of what's inside (fragile? flat? stacked?), and your estimated monthly quantity. A good corrugated supplier will recommend a board grade based on the product rather than just quoting the grade you asked for.
Compare custom quotes to your actual current stock cost including any void fill you're using. Often the business case is stronger than it first appears.