Method of measuring height of foot arch

A method of measuring the height of a foot arch, comprising the steps of:

• forming a mold by pressing a foot of a person on a mold form, made of a material easily deformable initially and hardly deformed after the initial deformation, and casting a foot cast by pouring plaster into said mold;
• determining a first intersecting point and a second intersecting point, said first intersecting point being determined by making a first line and a third line intersect, said second intersecting point being determined by making a second line and said third line intersect, said first line being a straight line extending from the center of a second toe to the center of a heel end, said second line being a straight line extending from the center of a big toe to a point spaced apart inwardly from the center of the heel end by ⅛ of a total distance of said heel end, said third line being a center line of a transverse arch of said foot;
• and
• measuring a first height and a second height while said foot cast is set in an upright position, said first height being defined between a flat base level and said first intersecting point, and said second height being defined between said base level and the second intersecting point.