Shoe width chart: reading B, D, 2E and 4E

What does a shoe width letter mean?

A width letter grades the widest part of your foot against the length you are already wearing. It is a position in a chart, not a fixed number of inches. On the American convention, D is the standard men's width and B is the standard women's width, so the same letter describes two different feet depending on which chart it came from.

Width is normally handled as a girth, the circumference around the ball of the foot, rather than a flat width across it. A shallow broad foot and a deeper narrow foot can therefore land on the same letter. That is one reason two shoes marked the same width can feel nothing alike.

What are the width letters, narrowest to widest?

Two ladders are in circulation, one for each chart. Neither is a legal standard. Both run in single steps, and brands stock a subset of them rather than every rung.

Men's widths

Women's widths

The women's ladder is centred on B, and it runs further into the A letters than the men's ladder does.

Where a brand offers width at all, the retail set is usually short. B, D, 2E and 4E is a common men's spread, and 2A, B, D is a common women's spread. Some brands drop the letters entirely and print N, M and W. Check the brand's own table before you translate.

Does a women's B mean the same width as a men's B?

No. B is the standard on the women's ladder and two steps narrow on the men's ladder. D is the standard for men and two steps wide for women. The letter names a position in one chart, so carrying it across without checking is how people end up in a shoe that is a full half inch of girth away from what they wanted.

This is the same failure as a letter size on a shirt. A ladies' cut Gildan G500L in Medium publishes a 17.5" flat chest. The unisex Gildan G500 Medium publishes 20.0" and a Next Level 3600 Medium publishes 20.5", so the same word covers a range of two and a half to three inches, from published brand specifications retrieved 27 July 2026. At Large the ladies' cut sits 3.0" below the unisex styles. Letters name garments, not bodies. Vanity sizing explains why the drift is not an accident.

How many inches is one width letter?

On the convention, one width step is about a quarter of an inch of ball girth. Flattened across the foot that is closer to an eighth of an inch of visible width, which is why width errors are so easy to miss by eye and so obvious after an hour of walking.

Why does the same letter change width at different lengths?

Because girth grades with length. A D is a D relative to its own length, so a longer shoe in D is absolutely wider than a shorter shoe in D. Follow the arithmetic in the table above and a men's 12 D carries roughly the same ball girth as a men's 8 in 4E, since four full sizes and four width steps are each worth about an inch.

That arithmetic belongs to the convention rather than to any shoe you can buy, and real lasts deviate from it. It is still the cleanest way to see why a width letter cannot be quoted as a single inch figure. Ask for the girth at your length, or ask for nothing.

Why is width the measurement most often ignored?

Three reasons, and none of them is that width matters less.

1. It is rarely printed — a box shows the length number in several systems and often no width at all. What is not printed does not get compared.
2. It is rarely stocked — a shop that carries one width per style has made the choice for you, and the letter on the label is whatever the brand calls standard.
3. It hides as a length problem — a narrow shoe feels short, because the foot rides forward and up when the sides squeeze. People buy a longer shoe and keep the wrong girth.

Most non-American systems do not carry a width letter at all. Mondopoint, standardised as ISO 9407, is the exception: it states foot length and foot width in millimetres together, which is the one common system where width is part of the size rather than an option. Length conversions across US, UK and EU are on the shoe size chart.

Can I size up in length instead of going wider?

You can, and it is the most common substitution in shoe buying. One full size adds about a quarter inch of girth, the same as one width letter, so the pressure across the ball does ease. It also adds about a third of an inch of length, which drags the shoe's flex point past the ball of your foot. The shoe then bends in the wrong place, and the heel starts slipping. Trading a width problem for a length problem is a trade, not a fix.

How do I find my shoe width without a Brannock device?

Stand up, put your weight on the foot, and run a tape around the widest part of it, across the ball. Note the girth in inches or millimetres and compare it against the brand's own width table, not a general one. Measure both feet, late in the day, and fit the larger one. The full method is in the guide on how to measure shoe size at home, and the length chart sits at shoe sizes.

Can ShirtMath measure shoe width from a photograph?

No, and this page will not pretend otherwise. A photograph alone cannot tell you your shoe size or your width. Width is a girth, and a camera cannot see around a foot. Getting to a letter needs either a size you already know and trust or a foot you have measured with a tape.

What ShirtMath does today is narrower and real: photograph a shirt laid flat with a scale card, get its flat measurements, and match those against published garment measurements across the catalogue. Sleeve opening and bicep are the least reliable readings, and anything the reader cannot see confidently is left blank rather than guessed. This shoe page is reference material, published because the same letter-versus-measurement problem runs through footwear.

Common questions

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