Is D width the same for men and women?

The actual width in millimeters is the same. But the FIT interpretation differs: D is medium for men (default), wide for women (size up from medium). A women's 9D fits the same width as a men's 9D — just labeled differently.

Should I buy D width if I'm a woman with wide feet?

Yes — women's D is the wide width. If your B-width women's shoes feel pinched at the ball of the foot, try D. Some unisex sneakers (Nike, New Balance) only stock D, which fits a women's wide foot.

How much wider is D than B?

About 6mm at the ball of the foot. B is roughly 94mm at men's size 9; D is 100mm. Each width letter step adds ~3mm. The difference is small in millimeters but very noticeable in fit comfort.

Do all brands stock D width?

All men's shoe brands stock D as the default. Women's shoes typically default to B; D is offered in athletic, comfort, and orthopedic lines (Brooks, New Balance, SAS, Vionic). Fashion women's shoes rarely come in D.

E (wide men's), EE/2E (extra wide men's), 4E (XX wide), 6E (extreme wide). For women: D, E, EE go up the same scale. See our full width guide.

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Sizing decoded May 26, 2026 4 min read

What Does D Width Mean in Shoes? (Men vs Women)

Q: What does D width mean in shoes?

D is the standard medium width for men's shoes — about 100mm at the ball of the foot for a US men's size 9. For women's shoes, D is a wide width (women's medium is B). Same letter, different fit interpretation by gender.

D is the standard medium width for men — and the wide width for women. Same letter, different gender interpretation. Here's the breakdown.

The Single-Sentence Answer

D = medium men's, wide women's

D is about 100mm at the ball of the foot at US men's size 9. It's the default men's width and the wide alternative to standard B for women.

D Width Across Genders

Gender	D interpretation	Equivalent
Men's	Standard medium (default)	Most off-the-rack men's shoes
Women's	Wide	Women's standard medium = B

Same physical width in millimeters; different fit category by gender. Buying women's 9D = buying a wide women's shoe; buying men's 9D = buying a medium men's shoe.

D Width in Millimeters

Men's size	D width (mm)
7	94mm
8	97mm
9	100mm
10	103mm
11	106mm
12	109mm

Each US half-size adds about 1.5mm to D width. For women's D, the same physical width applies — a women's 9D = 100mm at ball, same as a men's 9D.

When to Buy D Width

Men: Standard. 90% of men's shoes ship in D as default. If unsure, buy D.

Women: Buy D if standard B feels pinched at the ball, leaves red marks at end of day, or causes bunion pressure.

Athletic shoes: Many unisex sneakers (Nike, New Balance, Adidas) only stock D — fits men's medium and women's wide.

Dress shoes (women): Rare in D. Fashion brands stock B only. Comfort brands (SAS, Vionic, Munro) stock D.

FAQs

What does D width mean?

Standard medium men's; wide women's.

Same for men and women?

Same physical width; different fit interpretation.

Buy D as a woman with wide feet?

Yes — D is the wide women's option.

How much wider than B?

~6mm at ball of foot.

Brand availability?

Universal in men's; selective in women's.

Wider than D?

E, EE, 4E, 6E.

Get Your Width Right

For more on shoe widths see EE/2E/4E decoded; how to measure your foot; full men's shoe chart; women's shoe chart.

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