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The U.S. recognizes two grades of mushrooms U.S.1 and U.S.2 U.S.
No.1
fresh
mushrooms
of
similar
size
and
variety,
fairly
well
shaped,
well
trimmed,
free
from
open
veils,
disease,
spots,
insect,
injury,
and
decay.
Size
classifications
are
Small
to
Medium
-
up
to
1
5/8
inches
in
diameter,
Large
-
over
1
5/8
inches
in
diameter
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