ISO 8559-4-2023 PDF

Full title and description

ISO 8559-4:2023 — Size designation of clothes — Part 4: Determination of the coverage ratios of body measurement tables. This standard specifies how to calculate coverage ratios for body measurement tables by comparing tables with two or three selected body dimensions of a targeted population, to assess how well a sizing table covers that population.

Abstract

This document describes the calculation of coverage ratios of body measurement tables in comparison with two or three selected body dimensions of the targeted population. It explains the statistical approach, limitations and practical application notes. The procedure requires an available anthropometric database for the target population. The standard notes that extending the method to four or more dimensions is theoretically possible but practically impractical for visualisation and interpretation.

General information

• Status: Published
• Publication date: 10 January 2023
• Publisher: International Organization for Standardization (ISO)
• ICS / categories: 61.020 (Clothing)
• Edition / version: Edition 1 (2023)
• Number of pages: 13

Scope

ISO 8559-4:2023 applies to the determination of coverage ratios for body measurement tables used in clothing size designation. It gives a method to compare a given body measurement table against anthropometric data from a targeted population by selecting two or three body dimensions and computing the proportion of that population that falls within the table entries (the coverage ratio). The document is intended for use only when a representative database of body dimensions for the targeted population is available. It does not prescribe garment allowances or garment dimensions and advises against practical use of four-or-more dimensional coverage calculations because of low percentages and visualization difficulties.

Key topics and requirements

• Definitions and prerequisites for input data (requirement for a representative anthropometric database).
• Selection of two or three body dimensions for coverage assessment (guidance on dimension choice).
• Statistical method for calculating coverage ratios and interpreting results.
• Instructions on tabulation, grouping and interval treatment of measurements.
• Limitations and notes on extending calculations to higher-dimensional assessments (4+ dimensions) and associated visualization issues.
• Reporting recommendations so results can be compared and communicated to sizing and product development teams.

Typical use and users

Used by apparel product developers, size specification teams, fit engineers, anthropometric researchers, national standards bodies and retailers. Typical applications include validating or revising body measurement tables, quantifying how well a sizing table covers a target market, supporting decision-making for size set selection, and informing digital fitting and size recommendation systems.

Related standards

ISO 8559-4 is part of the ISO 8559 series for size designation of clothes. Key related documents include ISO 8559-1 (Anthropometric definitions for body measurement, 2017), ISO 8559-2 (Primary and secondary dimension indicators — original 2017 edition, revised in 2025), ISO 8559-3 (Methodology for the creation of body measurement tables and intervals, 2018) and ISO 8559-5 (Anthropometric measurements for the head and face, 2023). The series is maintained by ISO/TC 133 (Clothing sizing).

Keywords

coverage ratio; body measurement table; sizing table; anthropometry; clothing size designation; ISO 8559; measurement intervals; fit assessment; ISO/TC 133; ICS 61.020

FAQ

Q: What is this standard?

A: ISO 8559-4:2023 is an international standard that defines how to calculate the coverage ratios of body measurement tables—i.e., the proportion of a target population whose body measurements fall within the entries of a given sizing table.

Q: What does it cover?

A: It covers the statistical method and practical guidance for comparing body measurement tables with anthropometric databases using two or three selected body dimensions, including data prerequisites, calculation steps, limitations and reporting guidance.

Q: Who typically uses it?

A: Apparel manufacturers, size and fit engineers, product developers, anthropometric researchers, retailers and standards/measurement organisations use it to validate or design sizing systems and to quantify how well sizing tables represent a target population.

Q: Is it current or superseded?

A: ISO 8559-4:2023 is current; it was published on 10 January 2023 and is the first edition. (Users should check the status of other parts of the ISO 8559 series for more recent revisions where applicable.)

Q: Is it part of a series?

A: Yes — it is Part 4 of the ISO 8559 series (Size designation of clothes), which includes Parts 1, 2, 3, 4 and 5 addressing anthropometric definitions, dimension indicators, table methodology, coverage ratios and head/face measurements respectively.

Q: What are the key keywords?

A: Coverage ratio, body measurement table, anthropometry, size designation, sizing table, fit assessment, ISO 8559, measurement intervals.