For men, European shoe sizes 41 and 42 generally correspond to US sizes 8.5 and 9, respectively. European size 43 is typically a US men's size 9.5 to 10. Sizes 44 and 45 usually translate to US sizes 10.5 and 11. For women, a European size 41 is roughly equivalent to a US size 10, while 42 is a US 10.5, and 43 is a US 11. Here's a more detailed breakdown: Men's: EU 41: US 8.5 EU 42: US 9 EU 43: US 9.5-10 EU 44: US 10.5 EU 45: US 11 Women's: EU 41: US 10 EU 42: US 10.5 EU 43: US 11