Measure while standing with your foot firmly on the floor and parallel to your other foot.
 Measure Insole of your used shoes, " Insole - about 0.8cm = Foot length "
Size numbers are difference for each countries.
Once you know your foot measurements,then choose the matched size.
If there is any quesitons on sizes, kindly contact us freely .Thanks for noting.
The manual measurement, Error 1-2 cm, Please understanding.