Wide-width cowboy boots are cowboy boots sized for wider feet. In the United States, all shoes have a width notation. The notations in order from narrowest to widest are AAA, AA, A, B, C, D, E, EE and EEE.
For women's shoes and boots, narrow is A and wide is C, with B being the standard. For men, B is narrow and EE is wide, with D being the standard. Of course, anyone's foot can be any width. For wide or narrow feet, properly sized boots are important. Incorrectly sized boots can cause severe pain and deformities to the feet.