Finding the right size of shoes will be a challenge if you don’t know what the letter sizes mean. You might see different letters and abbreviations such as “M”, “BM”, “B(m)”, “D”, “D(m)”, and other lettering. What does “M” mean in shoe size? Also, what do “B” and “D” mean? M stands for “medium” width for a women’s shoe. B sometimes is used instead of M and also means a women’s shoe has a medium...