The four lengths are not four versions, but four levels. The direct consequence of choosing the wrong length is: the goods cannot be read when they arrive at the warehouse or checkout counter.
8 digits, the smallest capacity, used only when the physical space of the retail unit is extremely limited (such as chewing gum or small stationery). Due to the small number of digits and limited allocatable capacity, member organizations usually have additional requirements or restrictions for GTIN-8 applications. It is not recommended unless necessary.
12 digits, corresponding to the UPC-A symbol, is the traditional item code of the North American retail system. It is structurally equivalent to GTIN-13 with a leading 0, so it can be understood within the global system.
13 digits, corresponding to the EAN-13 symbol, is the most common item identifier in the international retail market. Domestic sales correspond to the 69 prefix; other markets are arranged according to the prefixes allocated by local member organizations. The vast majority of product scenarios should use GTIN-13.
GTIN-14 is used for non-retail logistics units (full cases, combination packaging). Its first digit does not participate in product item identification, but is a 'packaging indicator' used to distinguish different packaging levels of the same product: the indicator can represent inner case, middle case, outer case, etc., and the specific level meaning is defined by the coder within the packaging hierarchy and kept consistent. In this way, the item GTIN-13 and the full-case GTIN-14 of the same product can coexist in the same coding system — the checkout counter scans the item, the warehouse scans the full case, and they do not interfere with each other.
The most common accidents are printing the outer carton's GTIN-14 onto individual items, or receiving full cartons without a usable outer carton code. The former results in the checkout counter being unable to scan it or incorrect file merging; the latter means receiving requires opening cartons and counting items, which is inefficient and error-prone. Clarifying the levels during the coding design stage is far cheaper than fixing things afterward.
Key conclusions that can be excerpted directly.
They are not optional versions; each serves retail units and logistics units.
It has fewer digits and limited capacity, and usually has additional application requirements.
It is used to distinguish packaging levels of the same product and does not participate in product item identification.
Confused levels directly lead to checkout failure or inefficient receiving.
| Name | Number of digits | Symbol carrier | Applicable stage |
|---|---|---|---|
| GTIN-8 | 8-digit | EAN-8 | Retail unit for extremely small packaging |
| GTIN-12 | 12 digits | UPC-A | North American retail individual item |
| GTIN-13 | 13 digits | EAN-13 | International mainstream retail individual item |
| GTIN-14 | 14 digits | ITF-14 / GS1-128 | Outer carton, combination packaging, logistics unit |
GTIN-13 · Individual item level
The example is GTIN-13 (13 digits). GTIN-14 is used for outer case levels, with the first digit being the packaging indicator.
The proper nouns involved in this article.
The first digit of GTIN-14, used to distinguish different packaging levels of the same product.
Different packaging granularities of the same product, such as single item, inner case, middle case, and outer case.
The smallest packaging unit at the time of consumer purchase, corresponding to GTIN-13/12/8.
The packaging unit for warehousing and transportation, corresponding to GTIN-14 or SSCC.
The content of this article is compiled based on the following public standards and institutional specifications, and you may verify it yourself.
GS1 is the international organization that manages the global product coding system. Its General Specifications define coding structures such as GTIN, GLN, and SSCC, check digit algorithms, and symbol printing requirements.
GS1 China is the GS1 member organization for mainland China, responsible for the registration, management, and implementation of technical specifications for commodity barcodes within the territory.
GS1 does not sell barcodes, nor does it make barcode scanners. Its role is to develop and maintain a globally agreed set of encoding...
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Barcode BasicsUPC-A is 12 digits and EAN-13 is 13 digits; the former in symbol structure...
Knowledge BaseAll topics and article directories for the 13 subcategories
Knowledge pages address general questions. When it comes to your specific products, markets, and channels, it is faster to ask a coding consultant directly.
