Shipping marks on cartons: what to print on an export carton, and where
Shipping marks are what a warehouse, a customs officer and a forklift driver read off your carton. What goes in the main and side marks, where country of origin marking fits in, and a spec sheet to give the factory before packing starts.
Filed under Custom packaging
Short answer: Shipping marks are the words, numbers and symbols printed on an export carton so it can be identified, counted and handled: the buyer's mark or PO number, carton number, destination, weights and dimensions, country of origin, and handling symbols such as this way up.
An export carton spends weeks out of its owner's sight: on a truck, in a container yard, in a ship's hold, at a bonded warehouse, on a receiving dock. At each stop someone has to match it to the paperwork without opening it. The marks on the outside are how they do that. When marks are missing, wrong or out of step with the documents, cartons get misrouted, counted short, held for inspection or charged back by a retailer.
What shipping marks are
There is no single global form, but practice divides the marks on an export carton into three groups:
- Main marks. What identifies the shipment: usually the buyer's mark or initials, the PO or order number, the destination, and a carton number written as carton 12 of 200, often printed C/No. 12/200.
- Side marks. What describes the carton: item or product code, quantity per carton, net and gross weight, carton dimensions, and the country of origin.
- Handling marks. Symbols that tell people how to treat the carton: this way up, fragile, keep dry, a stacking limit. The pictograms are standardized internationally in ISO 780.
Marks go on at least two faces, usually an end and a side, so they can be read however the carton is stacked.
A real example from a container
The cartons in the photo below are from a container stuffed on one of the programs shown on the custom packaging page. Each side mark carries the PO number, the product code, the gross weight in kilograms, the measurement in centimeters, the pieces per carton, the warehouse it is going to, and the country of origin. Look closely and you'll see several cartons loaded with the printed face upside down or turned. That is normal in a tight stow, and it is the reason marks go on more than one face.
Notice what the marks don't carry: a description that would tell a casual handler what is worth stealing. Many buyers keep product names and brand art off the outer carton for exactly that reason, and use a code instead.
Carton marking requirements: country of origin is the legal one
Most shipping marks are commercial practice. Country of origin marking is a legal requirement for goods imported into the US. Under 19 CFR 134.11, unless an exception applies, "every article of foreign origin (or its container)" imported into the US must be marked "in a conspicuous place as legibly, indelibly, and permanently as the nature of the article (or container) will permit" to show "the English name of the country of origin."
Three points catch importers:
- The article, not just the carton. The rule is about telling the ultimate purchaser in the US where the product was made, and a master carton rarely reaches that person. Where the article or its retail pack can be marked, marking only the master carton generally won't satisfy it. When an article is excepted from marking, 19 CFR 134.22 requires the outermost container in which it ordinarily reaches the ultimate purchaser to show the origin.
- A US address needs an origin next to it. Under the same section, a container that bears the name and address of a US importer or distributor must be marked "in close proximity to the U.S. address" with the origin, with wording such as "Contents made in France." If your box or carton prints your US address, put the true origin, in the form "Made in" followed by the country, right beside it.
- It has to survive the trip. 19 CFR 134.41 says the marking "must survive normal distribution and store handling," and that the buyer must be able to "find the marking easily and read it without strain." A paper sticker that peels in a humid container is a risk.
The origin you print has to match where the goods were actually made, which is where they were last substantially transformed, not the port they sailed from. The partner factory network page explains how origin follows the manufacturing. The full regulation is 19 CFR Part 134 on eCFR, as published on October 2, 2026. This note is general information, not legal or customs advice. Confirm the marking for your own product with a licensed customs broker.
Marks have to match the paperwork
The carton marks, the commercial invoice and the packing list describe the same goods, and they need to agree. The packing list should show which carton numbers hold which items and quantities, with the same weights and dimensions printed on the cartons. When they don't match, receiving can't reconcile the shipment, and customs may ask questions.
The freight step lists this among the checks before goods ship: the commercial invoice and packing list match what is actually in the cartons, the country marking on the product and carton matches the origin, and carton marks, labels and any retailer routing rules are met.
Retailers and fulfillment centers often add their own rules on top: a set label size and position, barcodes, or a carton content label. Those come from each buyer's routing guide, and missing them can mean chargebacks. Ask for the guide before cartons are printed, not after.
Weights and dimensions: take them from a packed carton
Gross weight, net weight and dimensions feed the freight quote, the container load plan and often the warehouse's slotting. Take them from a real packed carton, not from a calculation. On Jack's packaging programs, the count per carton, the carton marks, the dimensions and the weight are set before the first lot is packed, so the freight quote holds.
Two habits help:
- Print metric and US units side by side if the goods are going to a US warehouse that works in pounds and inches.
- Keep one carton size per item where you can. Mixed cartons complicate the load plan and the count.
A shipping mark spec to send the factory
Send this before the cartons are ordered, not after they are printed:
- Main mark: your mark or initials, the PO number, the destination, and the carton number format, for example 1/200.
- Side mark: item code and description, quantity per carton, net and gross weight, dimensions.
- Origin: the country of origin wording and its position, next to any US address.
- Handling marks: which symbols, and on which faces.
- Barcodes and labels: any retailer or warehouse label, with its size and position.
- Faces: which faces carry which marks.
- A photo approval: a photo of the first printed, packed carton before the run.
Then check it on the floor. Pre-ship inspection at line watch covers quantity as well as cosmetics, and carton count and marks are checked before the container is sealed, because that is the last cheap place to catch a mistake. Boxes, inserts and master cartons can run in the same program as the product; the packaging step shows how.
Have a product, a box or a full pack-out to plan? Send the product details and your warehouse's rules through the quote form, and Jack will tell you what the cartons need.
Straight answers
What are shipping marks?
Shipping marks are the words, numbers and symbols printed on an export carton so it can be identified, counted and handled without being opened: the buyer's mark or PO number, carton number, destination, weights and dimensions, country of origin and handling symbols.
What are the carton marking requirements for goods imported into the US?
Most carton marks are commercial practice, set by the buyer, the forwarder or a retailer's routing guide. The legal one is country of origin: under 19 CFR Part 134, an imported article or its container must show the English name of the country of origin legibly and permanently unless an exception applies, and a carton printed with a US address needs the origin next to it. Confirm your product with a licensed customs broker.
What is the difference between main marks and side marks?
Main marks identify the shipment: the buyer's mark, PO number, destination and carton number. Side marks describe the carton: item code, quantity per carton, net and gross weight, dimensions and country of origin. Handling marks such as this way up are a third group.
Do export cartons need a country of origin mark?
Under 19 CFR 134.11, imported articles or their containers must be marked with the English name of the country of origin unless an exception applies, and a container showing a US address needs the origin next to it. Confirm your product's marking with a licensed customs broker.
What does C/No. 12/200 mean on a carton?
It is the carton number: this is carton 12 of 200 in the shipment. The same numbering appears on the packing list, so receiving can check which carton holds which items and confirm that none are missing.
Who prints the shipping marks, the factory or the buyer?
The factory or its carton supplier prints them, but the buyer should specify them in writing before the cartons are ordered: the main and side marks, origin wording, handling symbols, labels and which faces carry them, then approve a photo of the first packed carton.
How this note was made: researched and drafted with AI assistance, checked against the sources listed below and edited at JCH Design & Manufacturing.