Please measure your left and right foot length and take a picture on your bare feet for our reference.
It is recommended to measure the length of your feet, and take a picture on your bare feet for us to access your foot shape. So that we can make recommendation to you on which type of shoes is suitable for you.
When drawing the line at the heel, recommend to stroke the pen at 75 degree.
When drawing the line at the toe, recommend to stroke the pen at 90 degree (i.e. to keep the pen straight).