Shoe Lasts and Metrology
"The close relationship between a man and his shoe maker was based on the shared secret of the client's measurements. The statistics of clients were never disclosed."
Traditionally before mass production, the original shoemaker started the process by taking a footprint outline of the sole. He whittled or chiselled a wooden last from the print. A last ( 'laest', Old English meaning footprint) was traditionally made from wood but are now available now in metal or plastic. They are complex structures made from many measurements (statistically determined). Lasts are not the same size and dimensions of the anatomical foot but instead an abstract form with specific functions. It is usually deeper in the midfoot region, has a sharp 'feather edge' where the upper surface meets the sole, is clipped in along the topline (around the ankle) and is flaired over and extended in the toe region. This provides shape, which applies appropriate tension when the shoe distorts to contain the loaded foot. Lasts provides a working surface on which flat leather components can be given plastic form. The physical dimensions accommodate the foot during activity and the last contains contemporary fashion and styles such as toe shape. To allow the last to be removed from the shoe they are often hinged around the instep. Shoe lasts are not made to resemble feet but instead to suit the shoe manufacture. Modern lasts are totally unlike the foot with the sole of the last, flat in order to assist in manufacture. Shoe making was classified under three headings: turned shoes, welted shoes and through-seam shoes.
The turned shoe is made inside out with only an outset sole between the foot and the ground. The upper and soles are very flexible. The last is designed in a single size and then a set is made in the range of sizes and widths in which shoes are to be manufactured. Marked sizes will vary slightly from one manufacturer to another. No longer a popular technique.
Any construction using a welting, either as an intrigal part of the construction or simply for imitative effect.