What is ISO 24496 about?
ISO 24496 specifies methods for the determination of the dimensions of office chairs.
Note1: ISO 24496 does not contain dimensional specifications or requirements.
Note2: the test methods in ISO 24496 are based on the way anthropometric dimensions are measured.
Note3: ISO 24496 describes measurement methods that are used in conjunction with other relevant documents giving dimensional requirements.
Who is ISO 24496 for?
ISO 24496 on methods for the determination of dimensions of office chairs is useful for:
- Chair manufacturers
- Chair measuring device manufacturers
- Quality control professionals
- End users
Why should you use ISO 24496?
A new office chair measurement method and a new chair measuring device (CMD) to end the use of numerous sometimes conflicting chair measurement methods and CMDs with their weaknesses used in different countries around the world and make it easier to compare office chairs.
ISO 24496 provides the method for the determination of dimensions which will help in the proper measurement of office chairs which will ensure you are getting the right chair that is comfortable, safe and caters to your pressure management and support needs. 
What’s changed since the last update?
BS ISO 24496:2021 supersedes BS ISO 24496:2017, which is withdrawn.
BS ISO 24496:2021 includes some technical changes with respect to BS ISO 24496:2017. These include:
- "Angle – Origin and sign convention" has been turned into a new; the numbering of terms and definitions were adapted accordingly.
- The definition of backrest width has been revised
- Specification of the most prominent point has been given and the tolerances adapted
- Specification of the measurement has been described
- The bibliography has been updated
