Overview
EN ISO 20537:2025 - Footwear: Identification of defects during visual inspection (ISO 20537:2025) is a vocabulary standard that defines the most common terms used to describe defects in footwear visible at the end‑product stage. It covers defects that arise during manufacture, storage and use and is intended as a harmonized reference vocabulary for visual inspection, quality control and training across the footwear industry. The document clarifies terminology (with example photos) but does not set acceptance limits or inspection criteria.
Key topics
The standard organizes defect vocabulary into clear topical groups, including:
- General defects (e.g., colour variation, soiled shoe, poor printing, mildewing, spue)
- Material‑related defects (e.g., discolouration, impurity, air hole, crazing, sulfur blooming, shade variation)
- Component defects covering specific parts:
- Upper (crease, delamination, grain crack, exposed lasting margin, wrinkled leather)
- Counter and toe puff (collapsed counter/toe puff)
- Lining, insock, welt, foxing, heel, outsole and other components
- Manufacturing defects (assembly faults, gluing defects, sewing defects, other process defects)
- Defects within pairs (mismatches between left/right) and defects in markings
- Cross‑references to related ISO terms/databases and select standards (e.g., ISO 15115; note on ISO 8498/8499 for fabric defects)
Important clarifications:
- Example photographs are illustrative and not exhaustive.
- The presence of a listed defect does not automatically render footwear non‑conforming-acceptance is subject to agreement between supplier and purchaser.
Applications
EN ISO 20537:2025 is practical for:
- Manufacturers - standardizing inspection reports and internal QC language
- Suppliers and buyers - specifying defect terminology in contracts and technical specifications
- Third‑party inspectors and testing labs - reporting and comparing inspection results consistently
- Quality assurance teams and trainers - developing inspection checklists, training materials and visual aids
- Retailers and logistics - consistent identification of storage/handling damage
Benefits include reduced ambiguity in defect reporting, faster dispute resolution, improved training consistency, and clearer procurement specifications.
Related standards
- ISO 15115 (leather terminology referenced)
- ISO 8498 / ISO 8499 (fabric defects referenced for related weave faults)
- ISO Online Browsing Platform and IEC Electropedia (terminology databases)
Keywords: EN ISO 20537:2025, ISO 20537:2025, footwear defects, visual inspection, vocabulary, quality control, inspection terminology, footwear industry.