Some shoe manufacturers use not only men and women shoe size charts but also Shoe Widths Charts for men and women. To insure the perfect fit of your shoes you can use the shoe width chart to find out how wide your feet are. This especially very important when buying shoes on Internet. Manufacturers may have have small shoe width size variances.
Shoe Width Chart (USA Men’s Shoe Sizes)
Shoe Width Chart (USA Women’s Shoe Sizes)