The present invention relates to a foot size measurer for recommending shoes tailored to a customer by knowing an exact foot size of a customer. A matching unit (300) processing an entered value with an exact value of a user using data generated by the foot size measurer gets information from a database (400) and transmits the information to an output unit (500) to provide information to the user.발 크기를 정확하게 알아서 고객에 맞는 신발을 추천 해주는 것