Size number here is totally different from shoe size chart in your country, but your bare foot length would never change , so you must measure your bare foot with a ruler , then choose size with chart below . Important Notice: 1.2Please kindly measure your foot length by ruler first, when you choose the size. 2.The number marked in the shoes' sole is the Chinese size, not EUR size ! ! ! 3.Feet length is not insole length,insole length is 0.5 cm-1 cm longer than feet length!If you have any problem,please kindly contact us first. Routine size 40 = Chinese size 250 = Foot Length 25 cm Routine size 41 = Chinese size 255 = Foot Length 25.5 cm Routine size 42 = Chinese size 260 = Foot Length 26 cm Routine size 43 = Chinese size 265 = Foot Length 26.5 cm Routine size 44 = Chinese size 270 = Foot Length 27 cm Routine size 45 = Chinese size 275 = Foot Length 27.5 cm