ISO 18890:2018 PDF

Overview

ISO 18890:2018 - "Clothing - Standard method of garment measurement" is an international standard that defines the main garment measurement points and the standard methodology to measure garment dimensions. It provides a global reference for identifying key measurement locations, preparing garments for measurement, and performing consistent, reproducible measurements across a wide range of clothing types and components.

Key Topics

• Scope and purpose: Defines main measurement points and measurement methods; allows additional points by agreement between interested parties.
• Terminology: Standardized terms (e.g., Side Neck Point / SNP also known as High Point Shoulder, Centre Front / CF, From the Invisible Line / FIL) to reduce ambiguity in measurement reporting.
• Measuring methodology:
  • Lay garment flat on a clean, even measurement surface; close fasteners; avoid folds and creases.
  • Use a flexible, non-stretchable measurement tape graduated in millimetres (calibration recommended).
  • Measure in a straight line between defined points; identify measurements by codes (letters/digits).
  • For knitted garments, ensure a relaxed state; for tensioned measurements, stretch to the maximum without seam/fabric damage (see Annex A).
• Apparatus: Requirements for measurement surface and tape; allowance for alternative devices if they produce equivalent results and are reported.
• Preparation and conditioning: If required by parties, perform measurements in a conditioned laboratory room using the standard atmosphere per ISO 139 (20 °C, 65 % RH).
• Coverage of garment types and components: Detailed measurement points and methods for upper garments, sleeves (set-in and raglan), trousers/shorts, skirts, dresses, bras, briefs, swimsuits, ties, scarves, gloves, hats, socks, belts, and components such as collars and hoods. Annexes provide extended and specific measurements.

Applications and Who Uses It

• Apparel manufacturers and product developers - for consistent size tables, prototype development and sample approval.
• Quality control and production - production control, garment inspection and dimensional checks.
• Testing and certification bodies - measurement input for tests (e.g., dimensional change, conformity).
• Retailers and e‑commerce - standard sizing and measurement data to reduce returns and customer confusion.
• Patternmakers and technical designers - clear, unambiguous measurement definitions for pattern grading and fit evaluation.

ISO 18890:2018 helps harmonize garment measurement processes across the supply chain, improving consistency in size designation, fit communication, and quality assurance.

Related Standards

• ISO 139 - Textiles - Standard atmospheres for conditioning and testing (referenced for measurement conditioning).
• Prepared by ISO/TC 133 (Clothing sizing systems); use this standard alongside company-specific size systems and fit protocols for best results.

Keywords: ISO 18890:2018, garment measurement, clothing measurement standard, measurement points, measurement methodology, garment dimensions, ISO 139.