Shoe Width Sizes (B, D, 2E, 4E)
Length is only half the fit story. US shoes use letter codes (B, D, 2E, 4E) on the Brannock scale to grade width. The wide-fit tool treats each adjacent grade as about 4.8 mm at the ball of the foot. Most brands only stock standard (D for men, B for women) — if you need wide, your options are fewer but they exist.
What does D width mean in shoes?
D is standard width for men's shoes in the US system. Women's standard is B (or sometimes M for "medium"). If your foot spills over the sole edge or you feel pinching at the ball of the foot or across the forefoot, you likely need 2E (wide) or wider — not a longer size. Sizing up in length to compensate for width is the most common shoe-buying mistake.
Width letter chart
| Letter(s) | Meaning | Width offset vs D |
|---|---|---|
| AAA | Very narrow | -19.2 mm |
| AA / 2A | Extra narrow | -14.4 mm |
| B | Narrow / women standard | -9.6 mm |
| C | Narrow-to-standard transition | -4.8 mm |
| D | Standard men / wide women | Baseline |
| 2E / EE | Wide men | +4.8 mm |
| 4E / EEEE | Extra wide men | +9.6 mm |
| 6E | Extra extra wide, select brands | +14.4 mm |
Offsets are generated from the same width engine used by the wide-fit hub. Last verified: Jun 2026.
What is 2E width in shoes?
2E (also written EE) is "wide" in men's US sizing — one width grade above D, or about 4.8mm wider at the ball in our conversion model. 4E (EEEE) is two grades above D, about +9.6mm, and 6E is about +14.4mm. These are real tooling differences, not just a label: a 2E shoe is built on a wider last, so the upper, insole and sole are all cut wider. If your toes curl to fit, or the shoe leaves pressure marks across the forefoot, 2E is the right fix, not a longer size.
Use width as a second axis, not a backup length
If your foot length converts to US 9 but your ball width maps wider than D, search for US 9 in 2E or 4E before trying US 9.5 D. Sizing up adds length first; it only helps width by accident, and often creates heel slip while the forefoot still feels squeezed.
How do I know if I need wide width shoes?
Four signs your feet need a wider width rather than a longer size:
- The ball of your foot presses against the upper or overhangs the sole.
- You develop blisters on the outer edge of the forefoot, not the toes.
- You habitually untie laces or loosen closures for relief — the shoe fits the length but feels like a vice around the foot.
- Insoles you add for cushioning make the width feel worse, not just the arch.
See the full analysis at our wide feet sizing hub, which covers the width-offset formula in detail.
Do women's shoes use the same width letters as men's?
The letter codes are the same, but the reference point shifts. Women's standard is B (comparable to a men's D in proportional terms — women's feet are proportionally narrower on the Brannock scale). A woman who needs wide width should look for 2A, D or 2E depending on the brand's labelling convention — some brands use "W" for wide rather than "2E" on women's silhouettes, which adds confusion.
Brand width availability
| Brand | Narrow | Standard (D) | Wide (2E) | XWide (4E+) | Notes |
|---|---|---|---|---|---|
| New Balance | ✓ | ✓ | ✓ | ✓ | Up to 6E on some models |
| Brooks | — | ✓ | ✓ | ✓ | Ghost, Adrenaline, Glycerin |
| ASICS | — | ✓ | ✓ | ✓ | Kayano, Nimbus, Cumulus |
| Skechers | — | ✓ | ✓ | ✓ | D'Lites, GOwalk, Arch Fit |
| Reebok | — | ✓ | ✓ | — | Classic, Nano |
| Saucony | — | ✓ | ✓ | — | Ride, Triumph |
| Hoka | — | ✓ | ✓ | — | Clifton, Bondi |
| Nike | — | ✓ | — | — | D only on most models |
| Adidas | — | ✓ | — | — | D only on most models |
| On Running | — | ✓ | — | — | D only, runs narrow |
Availability varies by model and market. Always confirm on the brand's own site or a specialist retailer.
Which brands are best for wide feet?
New Balance is the widest-ranging brand — some models go to 6E (extra-extra-wide). Brooks, ASICS and Skechers are the next tier with consistent 4E availability. Reebok, Saucony and Hoka offer 2E on select models. Nike, Adidas and On Running are standard (D) only on most silhouettes, making them a poor choice if you genuinely need a wider shoe. See the full brand comparison at our wide fit hub.