A device for measuring an inner size of a shoe, the device includes: a driving unit inserted into the shoe; a length adjustment unit having a length capable of being adjusted by the driving unit and having a shape of a stick that is elongated in front and rear directions of the shoe; and a measuring unit capable of moving along the length adjustment unit in the front and rear directions of the shoe and having a sensor for measuring a distance up to an inner surface of the shoe.

A device for measuring an inner size of a shoe, the device includes: a driving unit inserted into the shoe; a length adjustment unit having a length capable of being adjusted by the driving unit and having a shape of a stick that is elongated in front and rear directions of the shoe; and a measuring unit capable of moving along the length adjustment unit in the front and rear directions of the shoe and having a sensor for measuring a distance up to an inner surface of the shoe.