Allometry of Foot and Grading of the Shoe Last
Allometry is the change in size-related proportions due to growth. It is a widely observed phenomenon in animals. A large animal and a small animal have different proportions.
Small feet and large feet have different proportions. Large feet have an absolutely larger circumference but are relatively narrow.
In shoe last production, a standard size last is manufactured by hand. The lasts of other sizes are made by grading the standard last. Allometry of the human foot is taken into consideration when grading lasts.