The sole is the underlying part of a foot or shoe, that portion touching the ground. The type of sole found in period armory is the shoe sole, which has its toe to chief by default; it’s found in the canting arms (dial. Italian söra) of de Sori, mid-15th C. [Triv 325], and illustrated in Bossewell, 1572 [III.17].
In Society armory, we find an example of the sole of a human foot. While this charge is found in mundane armory in the arms of Voet [Woodward 207], it has not been dated to period. Like the shoe sole, the human foot sole has its toes to chief by default.
For related charges, see prints. See also leg, shoe.
Percival de la Rocque bears as a badge: A shoe sole per pale purpure and gules.
Mat of Forth Castle bears as a badge: The sole of a human foot vert.