Measurements of 1166 illustrations from Lange’s Flora Agaricina Danka confirm that there is a tendency for small agarics to be relatively tall with thin stalks, and for large agarics to be relatively short with thick stalks, as compared with the ‘average type’. Thus, the cube of the pileus diameter tends to vary in proportion to the square of the stipe width, and the pileus diameter itself is proportional to the height of the sporophore above a limiting height of about 20 mm.