According to the shoe size conversion chart from GrivetOutdoors.com, a mens size 7 in the US corresponds to a size 40 in Europe. Similarly, the Womens Size Grid from Pavers™ US shows that a US size 7 corresponds to a UK size 5 and a European size 38. Therefore, a size 7 in Euro is equivalent to a mens size 40 or a womens size 38.