# Commission Regulation (EC) No 1863/2004 of 26 October 2004 laying down the marketing standard applicable to cultivated mushrooms, Division: Minimum size

Extent: E+W+S+N.I.

The minimum cap diameter must be at least 15 mm for closed cap, veiled and open mushrooms and 20 mm for flat mushrooms.

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Source: https://www.legislation.gov.uk/eur/2004/1863/annex/division/III/division/1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2004-1863/annex/division-III/division-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.