A European 38 shoe size in US women’s is a 7.5, but the same box size can shift to a 7 or an 8 depending on which brand you buy.
That half-size swing lives in the shoe last, the three-dimensional mold that shapes each company’s fit, and in whether they round their conversion chart up or down.
A foot measuring roughly 9.25 inches from heel to toe lines up with the 7.5, yet width runs on its own scale: standard women’s D can squeeze at the ball of the foot while the length fits fine.
1. Size 38 Is a US Women’s 7.5
A European 38 shoe size in US women’s is a 7.5. The usual rule is to subtract 31.5 from the European size, so 38 minus 31.5 lands you right at 7.5.
Some charts round differently and will tell you to drop 1.5 to 2 full sizes instead, which is why you’ll occasionally see 38 labeled as a 7 or even an 8 depending on where you shop.
That half-size variance matters more than you’d think.
A 7.5 is not a universal truth branded into leather. It is the closest standard conversion, and close is where most online shoe buying lives.
When I am ordering from a European brand I have not tried before, I look for whether their size chart specifies exactly which US equivalent they use, because the 7 versus 7.5 question can be the difference between a shoe that fits and one that goes back.
2. Why Conversions Vary by Brand
A size 38 stamped on the box does not guarantee the same fit from one brand to the next.
The difference sits in two places: the sizing standard each company adopts and the shoe last, the three-dimensional mold that gives the shoe its shape.
One brand’s last runs narrow through the toe box, another builds volume for a roomier feel, and their size charts may list slightly different US conversions for that same 38.
I have seen European 38 labeled anywhere from 7 to 7.5 in US women’s depending on where I look.
The intended fit matters too.
Some houses cut snug by design, others leave breathing room for all-day wear. That choice shifts where your foot lands on the brand’s scale.
Before I buy, I pull up the specific brand’s size chart and match my foot measurement to their numbers, not to the generic conversion I found on a third-party site. It takes an extra minute and saves the return trip.
3. Measuring Your Own Foot
- Place a blank sheet of paper on a hard floor, stand on it, and trace your foot with a pencil held straight up. Measure the longest point from heel to toe in inches; a size 38 in US women’s is a 7.5, but that conversion only holds if your foot is roughly 9.25 inches long.
- Measure the widest part of your tracing across the ball of the foot. Women’s shoes are cut narrower than men’s, so a standard women’s D width gives less room across the toe box and midfoot than a men’s standard of the same size.
- Compare your width to the scale: narrow runs C, standard is D, wide is E, and extra wide is EE. If your foot spreads past the D line, size 38 will pinch regardless of length, and I would look for brands that stock E or EE widths rather than sizing up and ending up with a heel that slips.
Width Options Beyond Standard
Women’s shoe widths start at narrow and run through extra wide, each step adding room through the toe box and midfoot.
Clarks marks theirs C, D, E, and EE: C for slim feet, D for standard, E for wide, EE for extra wide.
A European 38 translated to a US women’s 7.5 is only half the story if the shoe pinches across the ball of your foot.
Brand lasts, the molds each company builds its shoes on, differ enough that a D width in one label can feel like an E in another.
Some houses cut narrow as a design signature; others build in extra width for comfort. Checking the brand’s own size chart against your measured width matters more than trusting the letter stamped inside.
I treat width as a separate filter from length.
A 7.5 that fits my heel-to-toe measurement still fails if the forefoot squeezes. The same conversion table will not save you there.
Frequently Asked Questions
What is a size 38 in US women’s shoe sizes?
A European 38 shoe size in US women’s is a 7.5.
The usual rule is to subtract 31.5 from the European size, so 38 minus 31.5 lands right at 7.5. Some charts round differently and will label 38 as a 7 or even an 8 depending on where you shop, so checking the specific brand’s chart matters.
How do I convert European shoe sizes to US sizes?
To convert European shoe sizes to US women’s sizes, subtract 31.5 from the European size.
Another common shortcut is to drop 1.5 to 2 full sizes instead. Either method gets you close, but brand charts vary, so matching your actual foot measurement to the brand’s numbers works better than any generic formula.
Why do shoe sizes vary between brands?
Shoe sizes vary between brands because of differences in sizing standards and shoe lasts, the three-dimensional molds that give shoes their shape.
One brand’s last runs narrow through the toe box while another builds volume for a roomier feel, and their size charts may list slightly different US conversions for that same 38.
Is size 38 a 7 or 8?
A European 38 is most commonly a US women’s 7.5, though you will see it labeled as a 7 on some charts and an 8 on others.
The half-size spread exists because brands round conversions differently and build on different lasts. I always check the specific brand’s size chart before ordering rather than assuming one number.
