The adult foot, when properly formed, is straight from heel to toe on the inner side, and is wider across the joints than one inch or so farther back. The manner of walking has a considerable bearing on the character and development of the foot.

There are many sorts of feet, which are due to a number of causes, such as habits, climate, occupation, locality, etc. As a general rule we may divide the feet into four classes: Bony feet—those with very little flesh upon them; hard feet—those that have plenty of flesh, but which are almost as hard as a stone; fat feet—plump, with plenty of flesh, but having little shape; spongy feet—those that seem to have no bones in them, usually found in the female sex.

The characteristics of a foot are common with the body to which it is connected. Some people have a strong, bony frame, with strong, firm muscles, prominent bones and muscles, and a flesh that is hard. The feet of this type of person are usually long, bony, and arched, with a well-developed big toe joint. The heel measurements are large in proportion. A soft foot is prevalent among the Scotch. The feet of a person who is delicately shaped, with a small frame and thin, small, tapering muscles, are usually thin and finely formed, giving evidence of quickness. This kind of a foot in a man has a tendency to develop a flat foot.

A person with a form inclined to plumpness, full of exercise and activity, and a good circulation, has a well-developed foot. The heel is round and fairly prominent, although there are no special bony prominences. On the other hand a person with a body of general roundness, but with tissues and muscles flabby, and a languid blood circulation, has feet that are short, soft, and flabby.

We will allow that these four different kinds of feet all measure a 4 size and D in width. One would naturally think that the same size shoe would fit them all, but this is not so. This size shoe will only fit one and that is the bony foot. The hard feet require a C½ width; the fat feet require a C width, and the sponge feet require a B width.

The same last may, and often will possess a slight variation in some manner or other. The fitter of feet must know the stock, each pair, and be on intimate terms with the peculiarities of each last and the inside lines of each pair of shoes before attempting to try them upon the feet of the customer.

Different makes of footwear are apt to be manufactured over a slightly varying system of measurements. One line of shoes made over a small measure may be longer or shorter or narrower or wider than some other line. The heel measurements require careful study for each line introduced. The peculiarities of each line must be tested by tape and measure, and the foot fitter must have a strong knowledge along these lines.

We should measure the foot by the stick if necessary, and make a note of the size and width that will be likely to prove a fit. The height of the arch must be considered, and the shape of arch curve, the shape of the instep, and the general contour of the foot. A normal foot will show about a half-inch arch. The average foot will carry from an inch to an inch and a quarter heel, without putting a strain on any of the joints of the foot. Some feet vary from this by a wide margin. A foot is a trifle longer in walking than in repose. Allowance should be made, in using the measuring stick, over what the foot actually draws on the stick. In men’s shoes the allowance, should be from two to two and one half sizes.

When a one-legged man buys a shoe, the dealer sends to the factory a shoe to match the one left remaining. In these days of the use of machinery in every process of their manufacture, shoes are made with the utmost exactness and precision, and it is easily possible to mate that remaining shoe with the greatest nicety in size, style, material, and finish.

Few people have feet exactly alike; commonly the left foot is larger than the right, so that one shoe may fit a little more snugly than the other. Commonly, however, people buy shoes in regularly matched pairs, the difference in their feet, if it is noticeable to them at all, not being enough to make any other course desirable.