I got a C width and the shoe is just wide enough for me.

They have a stiff sole with rigid plastic on the sides of the shoe just above the sole which means the foot does not flex or move when striding. This means you feel secure and can't pronate or twist your ankle easily.

It is a different style of shoe from the type with a flexible sole and soft sides which feels like wearing moccasins. I like both types of shoe - the flexible type feels better on dirt paths and the stiff type feels better on harder surfaces.