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.
1 The standard Men's width is D. For Women, the standard width is B. If the majority of shoes you own fit adequately, these are the widths you should select.  If the shoes you own tend to feel overly spacious in width, you should consider selecting a narrower width size.