Step 1
Open and square
Open the box and push it square. A box that will not square up has permanent set from overloading or bad storage, and belongs in a lower grade.
Sizes & specs · grading
Five rungs, written down, with common reject reasons included.
A grade describes what you should expect to find when the boxes arrive. There is no industry standard behind it, so this page sets out a common way to describe condition, including what typically fails a box at each level. Ask each supplier how they grade.
- Grades
- 1A through 5A
- Standard
- None; varies by supplier
- Tip
- Ask for photos of the lot
Ask for a grade
Put the grade in the Grade field and the size in Product Type. If you are unsure, describe the job and a partner supplier follows up.
Answer first
Buy the lowest grade that survives the job.
Corrugated loses strength through moisture, crushing and repeated folding — not through scuffs, labels or faded print. That single fact separates the two things a grade describes: structural condition, which decides whether the box works, and cosmetic condition, which decides whether anyone minds.
A 3A box with four old labels and a scuffed side wall carries the same load as a 1A. If the box never leaves your building, the only difference you will notice is the money you did not spend.
1AFirst use, as-newOne trip, or none
Condition
Square, clean, no printing bleed-through, no staple pulls, no crush at the top edge. Corner posts sharp. Often surplus from an over-ordered production run rather than a genuine second-hand box.
Best for
Applications where appearance matters, anything shown to a customer, and shipments that may be opened and re-closed.
Price band
Typically the highest-priced used grade, and still usually below a new box of the same spec.
Common reject reasons
Any water line, repair tape or odour.
2ALight use, clean and squareOne to two trips
Condition
Structurally untouched, minor scuffing, maybe a single previous label. Flaps intact and unstapled or cleanly stapled once. Stacks to its rated height.
Best for
Everyday production packing, regrind, returns, retail reverse logistics, most shipping applications.
Price band
Often the balance point between cost and condition.
Common reject reasons
Delamination, punctures, crushed corners.
3ASound with cosmetic wearTwo to four trips
Condition
Honest wear: multiple labels, scuffed print, light edge crush on one corner, surface abrasion. Nothing that changes how it loads or stacks, but it will not photograph well.
Best for
In-plant WIP movement, scrap and recycling collection, floor bins, anything that stays inside your building.
Price band
Lower priced; often the cheapest box that still stacks when loaded.
Common reject reasons
Through-punctures, soft or damp board, missing flaps.
4ARepairable, heavy useFour or more trips
Condition
Needs work before it runs again: re-taping, re-stapling, a flap patch, sometimes a replacement sleeve. Usually offered as-is at a discount.
Best for
Buyers able to repair boxes themselves, single-trip internal use, one-way scrap shipments.
Price band
Usually the lowest-priced option sold per box.
Common reject reasons
Contamination, mould, anything that smells.
5AMixed loadUnsorted
Condition
A mixed pallet or load: sizes, walls and conditions together, sold by the load rather than the unit. What arrives is whatever the supplier had on hand.
Best for
Buyers who sort their own, small recyclers, art and prop departments, anyone who needs volume more than consistency.
Price band
Often quoted per load rather than per box.
Common reject reasons
Wet, contaminated or hazardous boxes should be excluded; confirm with the supplier.
Matching
Which grade for which job.
If your application is not listed, the rule of thumb holds: structural demand sets the floor, visibility sets the ceiling.
| Application | Grade | Why |
|---|---|---|
| Customer-facing shipment, photographed | 1A | Cosmetics are part of the deliverable |
| Outbound to a trade customer | 2A | Clean and square without paying for perfection |
| Dry ingredient with a liner | 2A | Liner separates product from board; box handles load. For food contact, check with your own QA |
| Internal WIP between departments | 3A | Nobody outside sees it; strength is unchanged |
| Scrap and regrind collection | 3A | Hard life ahead; cosmetics irrelevant |
| One-way outbound scrap shipment | 4A | Single trip, then recycled at destination |
| High-volume buyer who sorts in-house | 5A | Lowest price per unit; you supply the labour |
| Export where customs will open it | 1A – 2A | Re-closing a worn box at a border is a real risk |
Common reject reasons
Six things that fail a box at any grade.
These are not grade-dependent. A box showing any of them is usually best left out, whatever else is right about it.
Moisture
Best checked with a pin meter. Damp board loses edge crush strength fast and never fully recovers it.
Odour
If it smells of anything, the next product in it may too. 'It will air out' is rarely true.
Residue or contamination
Chemical, food or unidentified. It is better recycled than reused.
Delamination
Liners separating from flutes. The box may look square and will fail under load without warning.
Through-punctures in a load-bearing face
A hole in a side wall interrupts the vertical column that carries stacking load.
Crushed bottom edge
The single most common real failure, and one that a photograph of the top of a pallet will never show.
Questions
Grading, answered.
Is there an industry standard for gaylord box grades?
No. The 1A to 5A vocabulary is widely used but there is no governing body and no enforced definition, which means one supplier's 2A can be another's 4A. That is why it is worth asking each supplier how they grade and asking for photos of the specific lot you are quoted.
Which grade should I buy?
Buy the lowest grade that survives the job and satisfies who sees it. If the box never leaves your building, 3A is almost always right. If a customer opens it, 2A. If it is photographed or food-adjacent, 1A. Buying 1A for internal material handling is a common way to overspend.
Do lower grades carry less weight?
Cosmetic wear does not by itself reduce edge crush strength, so lighter-wear grades can carry close to the typical rating. Lower grades may be derated, and a mixed load has no single rating. Any box with visible edge crush should be treated as derated regardless of grade. Confirm with the supplier.
Can I mix grades in one order?
Yes. Buyers often use 2A for outbound shipments and 3A for internal movement, banded and labelled separately so they cannot be mixed up. Ask the supplier whether a mixed order is available.
Inspecting a box
A quick inspection routine, step by step.
Whether you are checking a photo from a supplier or a pallet on arrival, this order of checks catches most problems quickly.
Step 2
Vertical edges
Run a hand down all four. Crushing or rounding here removes part of the load path and cannot be repaired, so it usually means a downgrade regardless of everything else.
Step 3
Bottom edge and base
Turn the box to check the bottom edge, a very common failure point. Check the base panel for score-line cracks at the same time.
Step 4
Moisture
Damp board loses strength fast. A moisture meter on the bottom course is the reliable check, because board rarely feels damp until it is badly affected.
Step 5
Delamination and punctures
Check the liners for separation from the flutes, and the walls for through-punctures in load-bearing faces.
Step 6
Odour and residue
Smell the box and look at the interior. Any odour, or residue of unknown origin, is a reason to reject it.
Step 7
Mark and sort
Mark the grade on the box, plus the reason if it failed, and keep rejects separate from stock you intend to use.
Where grades come from
Storage predicts condition better than almost anything else.
How a box was stored while it waited to be reused says more about its condition than its age or how many times it has travelled.
Boxes that stay dry, flattened and banded on pallets indoors generally come out in better condition than the same boxes left against an outside wall or stacked loose. Sectors that handle dry, organised product often produce cleaner used boxes, while boxes from damp or outdoor storage are more likely to be downgraded or rejected for moisture and contamination.
Ask a supplier where the boxes came from and how they were stored. It is a quick way to judge whether a stated grade is likely to hold up.
Verifying a supplier
How to check that a supplier's grades mean anything.
There is no governing body for this vocabulary. These six checks work on any supplier.
- Ask for the written grading standard, the document and not a description of it
- Ask what gets a box rejected at each grade, and see whether the answer is specific
- Ask for photographs of the actual lot, including one bottom edge
- Ask what happens to boxes that fail their grading; the answer shows how seriously they take it
- Buy one pallet and hold it against the written standard before scaling
- Ask what the boxes previously held; any real inbound process records the source sector
Not sure which grade? Describe the job instead.
Tell us what goes in the box, where it travels and who opens it, and a partner supplier follows up. Availability depends on partner suppliers.