A cruciform trimmer line includes a line body (10) and teeth (30) formed on two opposing sides of the line body (10). The teeth (30) each defines a crest (31), a trough (32), and a plurality of connecting sections having different heights measured from the crest (31) to the trough (32). The line body (10) has a substantially cruciform cross section (20). The cross section (20) defines a first span (S1) and a second span (S2). The span ratio of the first span (S1) to the second span (S2) ranges from 0.5: 1 to 1.3:1.
