EU 40 in women's shoes tops out many European ranges, where 40 or 41 is the largest size a mainstream line cuts before switching to a large-size label.
CM to US conversion
Women's US comes from the centimetre length by subtracting 17 flat, so 24 cm is US 7 and 27 cm is US 10 with no drift. The foot measurement leads and the US size follows, which keeps whole-centimetre feet on whole US numbers and avoids the rounding that dogs the EU pair. Going straight from a measured centimetre length to US is the most reliable route, since it skips the last-length assumptions the EU scale adds.
At this size, CM to US
One size up from 25.5 cm, US moves 0.5 to US 9 while the metric length rises 0.5 to 26 cm. Both 25.5 cm and US 8.5 sit on a half step at this size. For 25.5 cm, the US column here runs US 8, US 8.5, US 9, stepping a half size at a time.
This women's page reads 25.5 cm against
one gender grid, because men and women share a foot length but not a size
number: the same 25.5 cm in men's shoes is
US 7.5 . Most charts pick a
gender without saying so, which is why a bare size search returns answers that
disagree by a full number.
Foot length vs shoe length
A CM shoe size is your measured foot length, not the space inside the shoe.
Brands add 0.5 to 1.0 cm of toe room so your toes clear the front. Japanese cm
labels already include about 1 cm of it, so a JP 24.0 measures near 25 cm
inside; an EU number instead describes the last. That built-in gap is why
conversion tables disagree.
Why one foot length gives many sizes
Size Chart CM EU US UK 24 37.5 7 5 24.5 38 7.5 5.5 25 39 8 6 25.5 40 8.5 6.5 26 40.5 9 7 26.5 41 9.5 7.5 27 42 10 8
Frequently Asked Questions Does 25.5 cm round up or down in US? US 8.5 and UK 6.5 are halves while EU 40 is whole, so an EU start rounds nowhere; between sizes, the larger with a snug lace holds better than the smaller.
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Note Based on Mondopoint standard (foot length in mm) Women's sizing differs from men's by approximately 1.5 US sizes Heel height affects fit - measure standing Shoe sizes can vary by brand and style See a number that looks off? Report an error on this page.