– For a sell as a fresh mushroom they are generally graded a/t the accepted international standard.

I. Bottons:

– Mushroom with membrane closed only just forming; stem length not to exceed 2 cm; cup measuring 3-6 cm across.

II. Cups:

– Mushroom with membrane well developed or just opening with cap retaining a pronounced cup shape; stem length not to exceed 2.5-3 cm.

III. Opens:

– Mushroom which have advanced beyond the cup stage, the cap forming a letter ‘T’ with the stalk; cap diameter 5-7 cm and stem length not to exceed 2.5-3 cm. These mushrooms are also called ‘flats’.