Why are women's shoe sizes 1.5 higher than men's?

It's a convention of the US sizing system. Both men's and women's US sizes are built on the same foot-length scale, but the numbering is offset by 1.5, so identical feet get different size numbers depending on which system is used.

Men's to Women's Shoe Size Conversion (Full Chart + Examples)

Q: What is a men's 8 in women's shoe size?

A men's 8 is a women's 9.5 in US sizing. Women's shoe sizes run 1.5 sizes higher than men's for the same foot length, so you add 1.5 to any men's size to get the women's equivalent.

Q: How do I convert women's shoe size to men's?

Subtract 1.5 from the women's US size. For example, a women's 9 is a men's 7.5, and a women's 10 is a men's 8.5.

Q: Is a men's shoe the same width as a women's?

No. For the same labeled length, men's shoes are cut wider than women's. A woman with narrow feet may find men's shoes roomy, and a man buying women's shoes may find them narrow, even at the correct converted size.

Women's US size = Men's US size + 1.5

So a men's 8 is a women's 9.5, and a men's 10 is a women's 11.5. To go the other way, subtract 1.5: a women's 9 is a men's 7.5.

The rule in one line

US men's and women's shoe sizes are built on the exact same foot-length scale — the only difference is that the women's numbers are offset 1.5 higher. That's why the conversion is a clean piece of arithmetic rather than a guess: add 1.5 going from men's to women's, subtract 1.5 going the other way. Half sizes carry across the same way (a men's 8.5 is a women's 10).

Full conversion chart (US)

Foot lengths are approximate and meant as a cross-check. The men's-to-women's offset itself (+1.5) is exact.

Worked examples

Men's US	Women's US	Approx. foot length
6	7.5	23.5 cm / 9.25 in
6.5	8	24.1 cm / 9.5 in
7	8.5	24.4 cm / 9.6 in
7.5	9	24.8 cm / 9.75 in
8	9.5	25.4 cm / 10 in
8.5	10	25.7 cm / 10.1 in
9	10.5	26.2 cm / 10.3 in
9.5	11	26.7 cm / 10.5 in
10	11.5	27.1 cm / 10.6 in
10.5	12	27.5 cm / 10.8 in
11	12.5	27.9 cm / 11 in
11.5	13	28.3 cm / 11.1 in
12	13.5	28.8 cm / 11.3 in
13	14.5	29.7 cm / 11.7 in

Men's to women's: a men's 7 is a women's 8.5. A men's 9 is a women's 10.5. A men's 11 is a women's 12.5.

Women's to men's: a women's 8 is a men's 6.5. A women's 10 is a men's 8.5. A women's 11.5 is a men's 10.

Don't forget width

The size number only covers length. For the same length, men's shoes are cut wider than women's. If you're a woman sizing into men's shoes, you may find them roomy — consider a narrow width or lacing them tighter. If you're a man sizing into women's shoes, expect a narrower fit even at the correct converted size.

Why the 1.5 difference exists

There's no anatomical reason — it's purely a quirk of how the US settled its sizing systems. Men's and women's sizes use the same underlying foot-length increments, but the starting points of the two numbering scales are offset by 1.5. The result is that two identical feet get labeled with different numbers depending on which section of the store the shoe came from. Unisex and many sneaker brands sidestep this by listing both numbers on the box.

Frequently asked questions

What is a men's 8 in women's shoe size?

A men's 8 is a women's 9.5. Add 1.5 to any men's size for the women's equivalent.

How do I convert women's shoe size to men's?

Subtract 1.5 from the women's US size. A women's 9 is a men's 7.5.

Is a men's shoe the same width as a women's?

No — for the same length, men's shoes are cut wider. The length converts cleanly, but the fit through the width will feel different.

Does this work for sneakers and running shoes?

Yes, the +1.5 rule applies across athletic and casual shoes in US sizing. Always confirm with the specific brand's chart, since some brands run slightly large or small.