Item guides

Running Shoe Width Codes D, 2E and 4E: Six Easy Checks

Width letters are distinct from shoe length sizes and can vary by brand and by men's or women's ranges. Use the official chart and an actual fit check instead of relying on a letter alone.

6 min read2026-10-28

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01

What you need

Exact shoe model and category
Manufacturer's width chart
Your normal socks

02

How to

1. Separate length from width. Numbers such as 260 or US 9 describe length sizes, while D, 2E and 4E refer to width options. If length seems right but the forefoot feels squeezed, inspect the width choices before increasing length.
2. Check the men's or women's category. Brooks labels men's B narrow, D medium, 2E wide and 4E extra wide. Women's Brooks sizes instead use 2A narrow, B medium, D wide and 2E extra wide.
3. Read the actual brand chart. New Balance Japan lists D as somewhat narrow, 2E standard, 4E wide and 6E(G) extra wide for men's and unisex shoes. Letter labels cannot simply be equated between brands.
4. Look at the exact model and colour options. Not every model is available in every width. ASICS says width codes may be printed under the tongue while standard-width boxes may have no extra marking.
5. Try the shoes with your usual socks, checking both space ahead of your longest toe and pressure along the sides of the forefoot. ASICS says bulging or stretching of the forefoot upper can signal a need for more width.
6. Compare standard and wide versions of the same shoe where possible. Check for heel slip as well as toe comfort: a roomier width is not useful if your foot moves excessively inside the shoe.

One more tip

D does not always mean medium width. Brooks calls men's D standard and 2E wide; New Balance Japan calls men's/unisex D slightly narrow and 2E standard. Check the relevant brand and model chart.

# shoe width # D 2E 4E # running shoes # shopping guide

Sources and media

OriginalOfficial manufacturer's shoe-width guidePublisher: Brooks Running

OriginalOfficial manufacturer's shoe-width guidePublisher: ASICS

OriginalOfficial manufacturer's shoe-width guidePublisher: New Balance Japan

OriginalOfficial manufacturer's shoe-width guidePublisher: Brooks Running Korea

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