What is a GTIN in fashion?
Global Trade Item Number, often called EAN in Europe: a unique barcode number identifying a specific product variant.
In short
A GTIN (Global Trade Item Number), often called an EAN in Europe, is the unique barcode number that identifies one specific product variant. In fashion, every combination of style, colour and size gets its own GTIN, so it is the number retailers scan at goods receipt, at the till and in every system that exchanges product data.
How does it work in practice?
A brand licenses a range of numbers from its national numbering organisation and assigns one GTIN to each sellable variant. A shirt offered in several colours and sizes therefore needs one number per colour and size combination, not one per style. The number is printed as a barcode on the swing tag or care label and stored in the product master data, where it links to the style number, colour code, size, price and composition.
When a retailer receives a delivery, staff scan the GTINs to confirm what arrived against the dispatch advice. The same number then appears on sales receipts, stock reports and re-orders.
Why does it matter?
The GTIN is the shared language between brands, wholesale customers and marketplaces. It enables:
- EDI orders, dispatch advices and invoices that match line by line
- Marketplace listings that are accepted without manual mapping
- Accurate sell-through and stock reports shared by retailers
- Replenishment of never-out-of-stock items based on scanned sales
How is AI changing it?
AI tools are increasingly used to clean product data at scale. They can flag duplicate GTINs, spot variants with missing numbers and check that the size or colour stored against a number matches the product images and descriptions. Demand forecasting and replenishment models also rely on GTIN level sales history, so data quality directly shapes the quality of their predictions.
Common pitfalls
- Reusing the GTIN of a discontinued item for a new product, which corrupts sales history
- Assigning numbers too late, delaying wholesale orders and marketplace launches
- Mismatches between the GTIN on the physical label and the one stored in the ERP
- Treating GTINs as an IT task rather than a governed part of product master data
Frequently asked questions
What is the difference between a GTIN and an EAN?
EAN is the older European name for what is now managed globally as the GTIN standard. In everyday fashion use the terms are interchangeable, and the familiar European barcode number is simply one format of GTIN.
Does every size of a garment need its own GTIN?
Yes. Each sellable variant, defined by style, colour and size, needs its own GTIN so that retailers and systems can tell exactly which item was ordered, delivered or sold.
