Being the product of a neutralization reaction between an acid and a base, sodium chloride is neutral, with a pH of seven. Sodium chloride is an ionic compound with the chemical formula NaCl. Continue Reading.
A D-width is considered a medium for men and a wide for women. It measures between 3 and 5 inches across the bottom of the ball of the foot, depending on your shoe size. For instance, in men's footwear, a size 10D is 4 inches across, while a size 14D is 4.5 inches across.
Measure the widest part of your foot width, then the length. Subtract .02 inch from each, and this will give you your foot size. Shoe widths range from 2.1 inches to 5.6 inches. The width widens as the shoe length size increases (see References for specific width charts).