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

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

The length of the stalk is measured:
from the gills under the cap for open and flat mushrooms,
from the veil for closed and veiled mushrooms.
Sizing is compulsory for mushrooms in ‘Extra’ Class according to following table, mushrooms of Classes I and II having to meet the specified size ranges if the terms ‘small’, ‘medium’ or ‘large’ are indicated:
Closed, veiled and open mushrooms
Diameter of cap
Maximum length of stalk
Size
Size limits
Cut mushrooms
Uncut mushrooms
Small
15-45 mm
1/2 of cap diameter
2/3 of cap diameter
Medium
30-65 mm
Large
50 mm and over
Flat mushrooms
Diameter of cap
Maximum length of stalk
Size
Size limits
Cut mushrooms
Uncut mushrooms
Small
20-55 mm
2/3 of cap diameter
Large
50 mm and over

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Source: https://www.legislation.gov.uk/eur/2004/1863/annex/division/III/division/2 (the official version)
Page: https://openlegislation.uk/eu-regulation-2004-1863/annex/division-III/division-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.