I haven't been able to find an actual size, but there was a reference to "60000 spores in an area the size of a fingernail".
It's not a good idea to inhale large amounts of the spores (search "winemaker's lung") but they don't seem to be associated with any problems when eaten.
It's not a good idea to inhale large amounts of the spores (search "winemaker's lung") but they don't seem to be associated with any problems when eaten.