FEFCO Style Codes: Reading 0201, 0427 and the Die-Line on Your Drawing

A quotation comes back from three Chinese carton factories for the same box. One is 18 cents, one is 24 cents, one is 31 cents. The specification you sent said "corrugated box, 400 × 300 × 300 mm, 3-ply, brown". Nothing in that sentence tells anyone which of four common styles to build, whether the flaps meet or overlap, whether a cutting die is involved, or whether the dimensions you gave are the ones your product has to fit inside. All three factories answered a different question, and all three answers were reasonable.

The four-digit FEFCO code closes about half of that gap in a single field. It is the most useful piece of shorthand in carton buying and the most commonly half-understood.

What the four digits are

The FEFCO/ESBO International Fibreboard Case Code assigns a four-digit number to a construction. The first two digits are the group — the family of construction. The last two identify the specific style within that family.

Inside group 02, the styles you will meet on almost every Chinese quotation:

• 0200 — half slotted container (HSC). One set of flaps only; the other end is open. Used as a tray or with a separate cap.
• 0201 — regular slotted container (RSC). All four flaps the same length, equal to half the box width, so the outer flaps meet at the centre and the inner flaps leave a gap. This is what "corrugated box" means unless someone says otherwise.
• 0203 — full overlap slotted container (FOL). Outer flaps run the full width and fully overlap. Double thickness across the top and bottom, and the strongest of the slotted styles at the panels most likely to be dropped on.
• 0204 — centre special slotted container (CSSC). Inner flaps extended so all four flaps meet at the centre. Flat, well-supported top and bottom without the full overlap.

And the one that dominates retail and e-commerce buying: 0427, a one-piece die-cut tray from group 04 with an integral hinged lid and locking tabs — the style behind most mailer boxes that arrive at a consumer's door without tape on them. No manufacturer's joint, no glue, no tape to erect.

The code fixes the construction geometry. It does not fix the board, the dimensions, the joint, the print, the tolerance or the flute direction. A drawing that says "FEFCO 0201" and nothing else is roughly a fifth of a specification. The rest of the fields are what stops three quotations diverging by 70%, and they belong in the same written spec sheet as everything else.

The dimension convention that costs the most money

FEFCO dimensions are internal, in millimetres, in the order length × width × height — length being the longer of the two base dimensions, width the shorter, height measured internally from the inside of the bottom flaps to the inside of the top flaps.

Three specific failures come out of that convention.

Sending external dimensions. A buyer measures the outside of an existing box and sends those numbers. On single-wall C-flute the difference is a few millimetres per dimension; on BC double wall it is bigger. Your product then does not fit, or fits with so little clearance that the packers fight it. State explicitly on the drawing: "all dimensions internal (ID), mm."

Not stating clearance. Internal dimensions are not product dimensions. A rigid product needs a few millimetres of clearance to go in and come out; a soft or bulging product needs more. Decide the clearance deliberately and write the internal dimension, rather than sending the product size and hoping the factory adds something.

Forgetting that the die-line is board-specific. The crease positions on a blank are offset from the nominal panel edges by an allowance related to the board caliper, so that the folded box comes out at the stated internal size. A die-line drawn for 3 mm E-flute and then run on 7 mm BC double wall produces a box several millimetres small inside on every axis. If you change the flute or board construction after approval, the die-line has to be re-issued — this is one of the most common reasons a second production run does not match the first.

Also state the tolerance. Corrugated is not machined; a realistic dimensional tolerance is a couple of millimetres per dimension, and the number should be on the drawing rather than argued about at inspection.

Style choice is a board-area decision

Here is the part almost nobody computes before choosing a style. Take the same internal size — 400 × 300 × 300 mm — and lay out the flat blank for each style.

For a slotted box, the blank runs 2 × (length + width) plus a joint tab across, and across the other axis it runs the box height plus the flap length top and bottom. The flap length is what the style changes.

(Blank length assumes a 38 mm joint tab; add the board-caliper allowances and the numbers move slightly, but the ratios hold.)

A full overlap box costs half as much board again as a regular slotted container of exactly the same internal size. That is not a rounding difference, and it is the honest answer to "why is your quote higher than the other factory's" when one supplier read your drawing as a 0203 and the other as a 0201. It is also, incidentally, one of the clean explanations for why quotes for the same spec differ.

Two further points fall out of the arithmetic:

Aspect ratio drives cost more than volume does. Board area for a slotted box grows with perimeter and with height, not with cubic capacity. A cube-ish box is the most board-efficient shape per litre; a long, shallow box is the least. If your product allows any choice of orientation, run the blank arithmetic on both before deciding.

The 04 group buys convenience with board. A 0427 has no joint, needs no tape to erect, and gives a clean unboxing — and it uses more board than an RSC of the same internal size, because the tuck panels, dust flaps and locking tabs are all extra material, and because the die-cut shape leaves trim waste that a straight-cut slotted blank does not. Ask the factory for the actual blank area and the sheet yield from its die-line, not an estimate.

Slotted or die-cut: the tooling fork

This is the operational fact behind the price difference, and it is worth understanding before you fall in love with a style.

Group 02 slotted boxes need no cutting die. They are made by scoring and slotting: the blank is creased and slots are cut on a printer-slotter or a slotting and creasing machine, then the joint is glued or stitched. Change the box dimensions and you change machine settings, not tooling. That is why an RSC can be quoted quickly, sampled quickly, and re-sized cheaply.

Anything die-cut needs a cutting die. Group 04 styles, retail structures, hand-holes, windows, perforated tear strips and locking tabs are cut with a die — a plywood board with steel cutting and creasing rules set into laser-cut kerfs, either flat or curved onto a rotary cylinder. That die is a physical object with a cost, a lead time of days rather than hours, and a storage and ownership question. Whether the die charge is separate, who keeps the die, and how long it is retained are commercial terms, and they behave much like other tooling arrangements in Chinese manufacturing — settle them in writing before the first sample rather than at the second order.

The practical consequence for an enquiry: if you are testing the market, quote an 02-group style. If your structure genuinely needs die-cutting, ask each supplier whether the die-cutting is done in-house or subcontracted, because a subcontracted die-cut step adds a transfer, a queue and a source of dimensional drift that an in-house line does not.

What a die-line file actually has to contain

"Send us the die-line" is where a lot of RFQs stall, because the buyer sends a photograph of a flattened box. A file a factory's pre-press can work from carries:

1. Scale 1:1, in millimetres, in a vector format — CF2, DXF or DDES for the structure; PDF or AI for artwork.
2. Cut lines, crease lines, perforation lines and bleed on separate layers, each named. Not distinguished by colour alone.
3. The FEFCO code and a plain-language style name.
4. Internal dimensions called out, marked as internal.
5. The board construction the die-line was drawn for — flute, ply count, caliper.
6. Flute direction shown on the blank, so it runs vertically in the erected box.
7. The joint tab: width, which panel carries it, inside or outside.
8. Glue or lock positions, if the style has them.
9. Print areas and keep-out zones, including where scores and slots cross artwork.
10. Dimensional tolerance per axis.
11. Any fitments — group 09 partitions and pads — as separate die-lines with their own dimensions.
12. Erected views, at least one, so the factory can sanity-check the flat against the intent.

Point 11 is the quiet one. Partitions, pads and liners are separate items with separate board, separate tooling and separate MOQs, and they are the single most frequently omitted line in a carton RFQ. The box comes in on budget and the fitments arrive as a cost surprise.

Where the naming diverges

You will meet three vocabularies for the same objects, and knowing which one your counterparty is using saves a round of emails.

• FEFCO/ESBO codes (0200, 0201, 0203, 0427) are European in origin and now used globally. They are unambiguous, which is why they are worth insisting on.
• US common names from the fibre box tradition — RSC, HSC, FOL, CSSC, Bliss box — describe the same constructions in words. They map onto FEFCO codes cleanly for the common styles and less cleanly for retail structures.
• Chinese national standards approach corrugated transport cases from a different angle: GB/T 6543 for single and double-wall corrugated shipping cases classifies by board class and required strength rather than by a style code. A Chinese factory quoting your box is often working with a domestic standard for the board and a FEFCO code for the shape, which is exactly why the style code and the board grade need to be two separate, explicit fields on your drawing.

Put the FEFCO code in the specification, and put the common name in brackets after it. It costs one line and removes an entire class of misunderstanding.

Common questions

Can a factory make a 0427 without a cutting die?

Not in production. A one-off sample can be plotter-cut, which is exactly why a hand-cut sample of a die-cut style proves the shape and the fit but not the production tolerances or the crease quality. Ask whether the sample was plotter-cut or die-cut before you approve it.

My supplier changed 0201 to 0204 to "make it stronger". Is that a fair swap?

It is a real improvement to the top and bottom panels, and it is about 17% more board on the blank for the same internal size. Fine if you asked for it and priced it. Not fine as a silent substitution, because it changes the blank area and therefore the cost basis of your quotation.

Does the style code affect stacking strength?

Indirectly. Compression is carried mostly by the four vertical corners, so the style matters less than board grade and box proportions, but flap arrangement changes how load is transferred into the corners and how the top resists dishing. Style choice sits downstream of the board and compression decision, not upstream of it.

What to ask your carton supplier next

Nine questions, sent with the drawing:

1. Which FEFCO code are you quoting, and does it match the code on my drawing?
2. Are the dimensions on your quotation internal or external, and in what order?
3. What blank size does your die-line produce for my internal dimensions, and what is the board area per box?
4. Which styles do you run without a cutting die, and which need one made?
5. Is die-cutting in-house or subcontracted, and flatbed or rotary?
6. What die-file formats do you accept, and can you return a die-line to me in that format for my artwork team?
7. What board caliper allowance did you use to set the crease positions, and for which board construction?
8. What dimensional tolerance will you hold, per axis, on the production lot?
9. Quote any fitments separately — partitions, pads, liners — with their own dimensions and MOQ.

Jindong Packaging is a sensible target for that list precisely because almost nothing in its listed range is a catalogue item — the CMH listing describes ODM full-material manufacture built to your drawing or sample, including colour boxes and gift boxes with custom die-lines and structures made to your artwork, out of a 12,000 m² plant in Xinqiao, Bao'an, Shenzhen running since 2007 with its own corrugating lines, printer-slotters and slotting and creasing machines. Questions 4, 5 and 6 are the ones the listing does not answer and the factory has to: which styles come off the slotting lines without tooling, whether die-cutting happens on site, and what die-file format the pre-press wants. With those settled, the commercial frame is workable for testing a structure — sampling quoted at about seven days, bulk at about fifteen working days, from 1,000 pieces with tiers at 3,000 and 5,000 — and worth reading alongside a broader view of how paper packaging suppliers in China are organised.