Women's 5 and men's 4 share this 220 mm foot, the one-number offset that runs through every unisex conversion and explains why men's and women's charts never line up.
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 5, UK moves 0.5 to UK 3.5 while US rises 0.5 to US 5.5, holding their spacing. Both US 5 and UK 3 are whole numbers here, so nothing rounds. For US 5, the UK column here runs UK 2.5, UK 3, UK 3.5, stepping a half size at a time.
Size Chart US EU UK CM 4 34 2 21 4.5 34.5 2.5 21.5 5 35 3 22 5.5 35.5 3.5 22.5 6 36 4 23 6.5 37 4.5 23.5
Frequently Asked Questions Does US 5 round up or down in UK? EU 35, US 5 and UK 3 land whole here, so this exact length rarely faces a rounding choice; between sizes, the larger laces down more kindly than the smaller pinches.
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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.