If your foot length is 23cm.    Choose size 36 =5.5
If your foot length is 23.5cm. Choose size 37 =6
If your foot length is 24cm.    Choose size 38 =6.5
If your foot length is 24.5cm. Choose size 39 =7
If your foot length is 25cm.    Choose size 40 =7.5
If your foot length is 25.5cm. Choose size 41 =8
If your foot length is 26cm.    Choose size 42 =9
If your foot length is 26.5cm. Choose size 43 =9.5
If your foot length is 27cm.    Choose size 44 =10
If your foot length is 27.5cm. Choose size 45 =10.5
If your foot length is 28cm.    Choose size 46 =11
If your foot length is 28.5cm. Choose size 47=12
If your foot length is 29cm.    Choose size 48 =13
If your foot length is 29.5cm. Choose size 49 =14
If your foot length is 30cm.    Choose size 50=15