A B in a woman’s shoe size denotes a normal or regular-width shoe, and a B in a man’s shoe denotes a narrow width, though sizing may vary depending on the manufacturer. An M may also be used to denote a woman’s shoe with a regular or average width.
According to Boot Outfitters, men’s standard width shoes are often sized with a D or an M. Shoes can be found in a range of widths, from triple broad to narrow. It is preferable to get measured in a shoe store to ensure a suitable fit. The ideal shoe width can be determined by measuring the foot at its widest point.
