The letter represents the width of the shoe, with N being Narrow, M being Medium and W being Wide.
Capezio EJ2 "E" series slip-on jazz shoe features a low profile design and is constructed with a soft durable leather. Other features include an EVA outsole patch and heel, Neoprene stretch arch insert and heel counter features an Achilles relief that provides a softer top line.
Sizing Guide
Ladies: One to one-and-a-half sizes larger than your street shoe size.
Men: Three to three and-a-half-sizes larger than your street shoe size.