Visco Number 40 Number 42 Red Sport Shoes Casual Orange Boot Mens Red Sneakers Sapatenos Fit Saoatenis Tenya Idea Resalethe only criterion is barefoot length. if foot is wide, choose bigger size. CHECK SIZES: US6. 5 =barefoot length 24. 1 24. 5cm =EUR size 39 US7 =barefoot length 24. 6 25cm =EUR size 40 US7. 5 =barefoot length 25. 1 25. 5cm =EUR size 41 US8 =barefoot length 25. 6 26cm =EUR size 42 US8. 5 =barefoot length 26. 1 26. 5cm =EUR size 43 US9 =barefoot length 26. 6 27cm =EUR size 44 US9. 5 =barefoot length 27. 1 27. 5cm =EUR size 45 US10 =barefoot length 27. 6