Abstract: A wrapping machine used to wrap with a prescribed wrapper a commodity having the shape of a hexahedron having a length, a width, and a height, as well as a top surface, a bottom surface, a front surface, a rear surface, a right side surface, and a left side surface; in this wrapping machine, the commodity being wrapped in a wrapping region, this wrapping region having a central position along the length of the commodity, and a reference wrapping position along the width of the commodity; the wrapping machine further comprising: a wrapping supply device that holds at least two wrappers of different sizes, and selectively supplies either of the wrappers to the wrapping region; a sensing device, provided in the wrapper supply device, that detects the sizes of the wrappers; a control device electrically connected to the sensing device, as well as operationally connected to the wrapper supply device; this control device has a display device, and it determines whether the sizes of the wrappers are within the usable