Save Time Shopping:For children who are painful to go to the shoe store or in a growth period,could use the foot measure device to measure the size of their feet at home,then order shoes online,which is much simpler than walking to the town to line up for shopping. Universal Size:The professional foot measure has a precise EU size 18-47 for measuring children and adults.There are also 2-12 UK adult sizes that make it easy to switch.This will ensure that the precious shoes you buy for child are suitable. Widely Applicable:Suitable for infants over 6 months,children,adults, men,women.It is a very useful gadget for families with children,could also be used in shoe stores,professional shoemakers. How to Use:Rest your heel against the bezel and move the white plastic slider to the toes,read the number by the pointed protrusion in the middle of the white box,this is the accurate size measured.Do not wear shoes or socks for measurements,as this will result in incorrect size.