Different country different material have different size standard .
So our US size ,Europe size may have some different with yours.
Pls measure foot length at first and then choose size correspondingly.
21.5-22cm foot length =4.5 size
22.1-22.5cm foot length =5 size
22.6-23cm foot length =6 size
23.1-23.5cm foot length =6.5 size
23.6-24cm foot length =7.5 size
24.1-24.5cm foot length =8.5 size
24.6-25cm foot length =9 size
25.1-25.5cm foot length =9.5 size
25.6-26cm foot length =10 size
26.1-26.5cm foot length =10.5 size
26.6-27cm foot length =12 size
If your foot size is standard ,please choose size as above.
If your foot size is fatter than standard , please choose the bigger one size ,
If your foot size is thinner than standard , please choose the smaller one size