Buckle piece, buckle set and wearable object

A buckle piece includes a base sheet, a plurality of protrusions and a plurality of openings. The protrusions are arranged to form at least one odd line and at least one even line, the at least one odd line and the at least one even line are alternately arranged along a first direction, and each of the at least one odd line and the at least one even line is disposed along a second direction. The openings are formed on the base sheet. A part of the protrusions and a part of the openings are alternately arranged on the at least one odd line, and the other part of the protrusions and the other part of the openings are alternately arranged on the at least one even line. One of the protrusions of the at least one odd line is adjacent to and aligned with one of the openings of the at least one even line along the first direction. Therefore, the production cost can be reduced.