For clothing, “size 42” usually means a European size, and the exact US equivalent depends on whether it’s men’s or women’s and on the item.

Quick answer

  • For women’s clothing (tops/dresses): EU 42 ≈ US 10 (sometimes labeled a medium/large).
  • For men’s jackets/suits : US 42 is already a US size; it’s about a large and equals roughly EU 52.
  • For shoes (EU 42) :
    • Men: ≈ US 9.
* Women: ≈ US **10–10.5** , depending on brand.

Because different brands fit differently, always check the specific size chart on the store’s website and, if possible, your body or foot measurements in cm/inches for the best match.