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Weights and measures - find out the law on trading standards for packaging and selling products

• Units of measurement

  You must use metric measurements (grams, kilograms, millilitres or litres)…

• Specified quantities

  Some goods must be sold in fixed sizes known as ‘specified quantities’.…

• Packaged goods

  Packaged goods are products that are all of these: sold sealed between 5g…

• Equipment and records

  Equipment for packaged goods The equipment you use to weigh or measure…

• Labelling packaged goods

  You must put the weight or volume of your packaged goods on the label. The…

NMO closed in 2015. A few legacy resources are retained below. Other content that was published by NMO is available on the National Archives website.

• Updated: 15 April 2021

This series brings together all documents providing updates on standards and technical documents issued by CEN.

• Updated: 26 February 2016

Information for businesses.

• Updated: 18 February 2025

• Updated: 27 December 2023

How the Thames Barrier works, and when it is scheduled to close.

• Updated: 14 October 2025

NMRO closed in 2016. Some legacy resources are retained below. Other content that was published by NMRO is available on the National Archives website.

• Updated: 15 April 2021

References to normative documents for measuring instruments in support of the Measuring Instruments Regulations 2016.

• Updated: 24 February 2025

Resources for business.

• Updated: 9 September 2025

How you can make sure your ambient air quality monitoring meets appropriate quality assurance requirements.

• Updated: 10 September 2024