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.
US to UK conversion
Subtract two from a women's US size to reach the UK one, so US 8 is UK 6 and US 10 is UK 8, a fixed step from the smallest size to the largest. Nothing rounds in this direction because both scales share the same half-size pattern, so a US 7.5 is a UK 5.5. With length settled by the flat offset, the real variable left is the last width, which differs more between women's brands than the number does.
At this size, US to UK
One size up from US 8.5, UK moves 0.5 to UK 7 while US rises 0.5 to US 9, holding their spacing. Both US 8.5 and UK 6.5 sit on a half step at this size. For US 8.5, the UK column here runs UK 6, UK 6.5, UK 7, stepping a half size at a time.
Size Chart US EU UK CM 7 37.5 5 24 7.5 38 5.5 24.5 8 39 6 25 8.5 40 6.5 25.5 9 40.5 7 26 9.5 41 7.5 26.5 10 42 8 27
Frequently Asked Questions Does US 8.5 round up or down in UK? 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.