Toe length:	From tip of the toe to perioplium along the dorsal toe wall
Toe angle:	The angle between the dorsal wall and sole level
Diagonal	From tip of the toe to the most proximal part of the rear bulb
Bulb angle:	The angle between sole level and bulb
Wear:	Difference between present and initial distance from toe tip to brand mark
Growth:	Difference between present and initial distance from perioplium to brand mark.