It just means that the shoe you need is a 11 Wide shoe. Just like me. It is a step up from the regular or 'normal' size.
In U.S. shoe sizes, a size 11 EE is both longer and wider than most men's feet.
E means extremely wide.
N in shoe size stands for Narrow.
One Size
M means medium, and is a reference to the width of the shoe, not the actual size.
A shoe size of 13 in America is an average size for a man. Women's shoe size average is a 7. No hidden meanings. That is all it means.
Small.
in shoe size
size 12 1/2
3M in U.S. shoe size is very simple. It means three medium. This shoe size is very small, especially for women.
2d + 11e +8d + 11e = 10d + 22e
a double size
girls size
a double size