Hello, I'm an expert in footwear sizing and I'm here to help you understand the nuances of different shoe sizing systems.

In the United States, shoe sizes are typically represented by a combination of a number and a letter. The number indicates the length of the shoe, while the letter represents the width. The most common widths are Medium (M), Narrow (N), and Wide (W). However, it's important to note that the "D" width is not standard in the US sizing system.

That said, "D" as a width designation is often used in the UK and Europe, where it stands for "D" width, which is a standard width that is neither narrow nor wide. It's similar to the "M" in the US system, but there can be slight differences in the actual measurements due to variations in sizing standards between countries.

So, to answer your question directly: In the context of US shoe sizing, "D" is not a recognized width. However, in the UK and European sizing, "D" is equivalent to a Medium width.

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Select width. For women's footwear, B is the standard width. 2A is narrow, D is wide, and 2E is extra wide. For men's footwear, D is standard, B is narrow, 2E is wide, and 4E is extra wide.read more >>