NRF Size Codes Definition
NRF Size Codes are a standardized set of numeric codes, published by the National Retail Federation, that assign fixed values to garment and footwear sizes. Rather than relying on size labels that differ by brand and region, each size maps to an agreed code that means the same thing to every trading partner.
Why do NRF size codes matter?
Sizing is inconsistent across brands, regions, and size systems, which makes raw size labels unreliable for matching and reporting. A coded size gives partners a common reference, so size ranges line up correctly when catalogs are consolidated or exchanged.
How do they work in a PIM?
In a PIM system, the NRF size code is stored as a controlled value on the size attribute and mapped to each partner's labeling. As variants are generated and published, the system emits the correct code per channel, keeping size data aligned across retailers and marketplaces.