Shoes · Guide

What Do Shoe Width Letters Mean? D, 2E, 4E and B Explained

D is a standard men's width and B is a standard women's. Everything narrower runs toward A, everything wider toward E — and the same letter means different things depending on whose chart you are reading. Here is the whole system in one place.

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By Mike M.Updated November 7, 2026How we pick

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The short answer

D is the standard men's width. B is the standard women's width. Letters earlier in the alphabet mean narrower; letters toward E mean wider, and a number in front multiplies it — 2E is wider than E, and 4E is wider than 2E. The same logic runs the other way for narrow: 2A is narrower than A.

The trap is that the letters are relative to gender, not absolute. A women's D is a wide; a men's D is a standard. Same letter, different shoe.

The full width chart

Width	Men's code	Women's code	Also written as
Extra narrow	—	2A	AA, Narrow
Narrow	B	—	Narrow
Standard	D	B	Medium, Regular, M
Wide	2E	D	EE, W, Wide
Extra wide	4E	2E	EEEE, XW, Extra Wide
Widest	6E	4E	Rare outside walking shoes

Brands label the same thing three different ways. Brooks writes “Narrow (1B), Medium (1D), Wide (2E), Extra Wide (4E)” for men. ASICS writes “D, 2E, 4E.” Saucony writes “Medium, Wide, Extra Wide.” They are describing the same ladder.

Why men's and women's codes differ

Because the starting point differs. A standard women's last is narrower than a standard men's, so the same physical width sits at a different letter on each chart. Lined up:

A women's D is a wide. A men's D is a standard.
A women's 2E is an extra wide. A men's 2E is a wide.
2A on a women's chart is the narrow option, and most men's lines simply do not offer a narrow at all.

This is why “I take a D” is not enough information to order a shoe with, and why swapping between men's and women's versions of the same model changes the fit even at the same stated length.

Working out your width

Three practical checks, in order of usefulness:

Look at your current shoes. If the upper bulges over the midsole at the widest part of your foot, or the material there is stretched and shiny, you are in too narrow a shoe. That is the single most reliable sign.
Do the pinch test. With the shoe on and laced, you should be able to pinch a small amount of upper material across the widest part of the foot. No slack at all means too narrow.
Measure in the evening. Feet spread through the day, and they spread further during a run. A shoe that fits at 8am and not at 8pm is the wrong width.

Which brands actually make them

Width availability varies enormously, and it is the single biggest constraint on what a wide-footed runner can buy. From the models on this site:

Shoe	Men's widths	Women's widths
Brooks Adrenaline GTS 25	1B, 1D, 2E, 4E	2A, 1B, 1D, 2E
Brooks Ghost 18	1B, 1D, 2E, 4E	2A, 1B, 1D, 2E
ASICS Gel-Kayano 33	D, 2E, 4E	2A, B, D
New Balance Fresh Foam X 1080v15	Standard, Wide, Extra Wide	Narrow, Standard, Wide

Brooks and New Balance are consistently the widest-serving brands; most Nike and adidas road shoes are standard width only, which matters more than any spec on the box if your foot needs room. Our best running shoe brands page compares the line-ups, including width.

Shoes with a real width run

Picks for this job

Four shoes that come in more than one width

Every one of these publishes at least three widths per gender, which is what you want when the letter on the box is the thing deciding your purchase.

C25K to marathon: the steady default
Brooks Ghost 18
Four widths in each gender on a neutral daily trainer — the broadest width run of any shoe on this site.
$125.20Amazon
#ad · Price as of November 13, 2026 · Affiliate disclosure for the link to Brooks Ghost 18
C25K to marathon: the benchmark support shoe
Brooks Adrenaline GTS 25
The same four-width run with GuideRails support, from Narrow to Extra Wide.
$124.95Amazon
#ad · Price as of November 13, 2026 · Affiliate disclosure for the link to Brooks Adrenaline GTS 25
10K to marathon: plush easy and long miles
New Balance 1080 v15
New Balance's flagship cushioned trainer, offered narrow through extra wide depending on gender.
$169.95Amazon
#ad · Price as of November 13, 2026 · Affiliate disclosure for the link to New Balance 1080 v15
Half and marathon: premium ASICS support
ASICS Gel-Kayano 33
Three widths per gender, including a men's 4E — though there is no women's extra wide.
$169.95Amazon
#ad · Price as of November 13, 2026 · Affiliate disclosure for the link to ASICS Gel-Kayano 33

If you already know you need room, go straight to best running shoes for wide feet or best running shoes with a wide toe box — which is a different measurement again, covering the shape of the front of the shoe rather than its width overall. At the other end, best running shoes for narrow feet covers 2A and B.

How we chose these

Researched, compared, scored for your level

We start from what a published training plan actually asks of a runner at your level, compare every model's published specs (stack height, drop, weight, plate, stability features, widths) against that job, and score each pick on a public rubric. Each spec links to where it came from, so you can shortlist in minutes and buy with the numbers in front of you.

Scores are our editorial judgments from that documented research, and rankings are earned on the rubric alone — placement is never for sale. The rubric and weights are on the How We Pick page.

Questions

Frequently asked

What does D width mean in running shoes?

In men's shoes, D is the standard width — the one you get if no width is specified. In women's shoes, D is a wide, because the standard women's width is B. The same letter means two different shoes depending on which chart you are on.

What is the difference between 2E and 4E?

4E is wider. In men's sizing 2E is a wide and 4E is an extra wide; in women's sizing 2E is the extra wide. The number in front multiplies the E, so each step up adds width across the ball of the foot.

Is B width narrow or standard?

Both, depending on gender. B is the standard width in women's shoes and a narrow in men's. This is the single most common width mix-up when ordering online.

Should I buy a wide shoe or go up half a size?

Buy the wide. Sizing up to gain width gives you a heel that slips and a toe box positioned past the end of your toes, which causes blisters and lost toenails. Length and width are separate measurements and should be bought separately.

Which running shoe brands make wide sizes?

Brooks and New Balance are the most consistent, both offering several widths across most of their road line. ASICS offers 2E and 4E on many men's models. Most Nike and adidas road running shoes are sold in standard width only.

Keep going

Receipts

Sources

Every figure above is traceable. Specs come from the maker's own pages or the named reviewer's published measurements (linked above); level definitions come from published training plans; prices come from Amazon's own API and carry the date they were checked, so you buy on a current number. Read the full method.