Is Eu 39 an 8 or 8.5 in the Us? Fact-Checking Conflicting Sizing Charts
Foot volume frequently turns an otherwise accurate length conversion into an uncomfortable fit. The continuous debate over wide vs narrow shoe width dictates whether an EU 39 behaves like an 8 or an 8.5.
Standard width in American women’s sizing is B, while standard men’s width is D. European shoemakers generally cut on a single width standard, roughly equivalent to an American women’s B/C or a men’s narrow C. If your foot falls on the wider side of the spectrum, an EU 39 that measures long enough on paper will compress your metatarsal heads.
Birkenstock addresses this directly by producing two width profiles for its EU 39:
- Functions like a true American Women’s B width, ideal for standard-to-slender profiles.
- Measures closer to an American Women’s D / Men’s E width, offering extra room across the instep and ball of the foot.
If you have a high instep, fallen arches, or bunions, an EU 39 in a structured shoe will almost certainly feel tighter than a standard US 8.5. In stiff materials like raw leather or vulcanized rubber, sizing up to an EU 40 is frequently required to compensate for missing width, rather than excess length.
