A wristband that can be attached comfortably to wrists or ankles of various sizes by adjusting a band length. The wristband includes: a display portion, a band portion in a first end portion of the wristband as an extension from one side of the display portion; the first end portion includes band holes, and is wrapped around a wrist or the like; a setting portion formed in the other end portion as an extension from the other side of the display portion, includes a setting hole, and is overlapped with the band portion to attach the wristband in loop form. Band hole displays are printed beside the band holes in positions corresponding to the respective band holes. Band hole displays constituted by the same sequence of numbers as the band hole displays are provided beside the band holes, and boundary marks indicating the application range of the corresponding band hole display are provided in a length measurement portion at identical intervals to the band holes.