Maxy Plus Size High Top Outdoor Cushion Man Sneakers Women Running Shoes Sport Men Running Men's Sports Footwear Black White GMB-1272the only criterion is barefoot length. if foot is wide, choose bigger size. CHECK SIZES: Size 5 = Barefoot Length 22. 6 23cm =EUR Size 36 Size 5. 5 = Barefoot Length 23. 1 23. 5cm =EUR Size 37 Size 6 = Barefoot Length 23. 6 24cm =EUR Size 38 Size 6. 5 = Barefoot Length 24. 1 24. 5cm =EUR Size 39 Size 7 = Barefoot Length 24. 6 25cm =EUR Size 40 Size 7. 5 = Barefoot Length 25. 1 25. 5cm =EUR Size 41 Size 8 = Barefoot Length 25. 6 26cm =EUR Size 42 Size