Lightly worn Alden flex penny loafer in black calfskin size 10.5 and width D/EE Width Alden's lasts are all "combination" lasts, where the heel is two widths narrower than the rest of the shoe. Alden denotes the width of the shoe as a fraction: the top of the fraction represents the width of the heel, while the bottom represents the width of the rest of the shoe. The bottom of the fraction is considered the width of the shoe and is the width upon which you should base your sizing. AA - A: Very narrow B: Narrow C: Medium-narrow D: Medium E: Medium-wide EE: Wide EEE: Extra wide