A saw tooth for mounting onto a holder of a circular saw or of a mower drum is provided. The tooth has a mounting end for mounting against a component of the holder, a cutting end, opposite to the mounting end, the cutting end being provided with at least one cutting edge; and a plurality of sides extending from the mounting end to the cutting end. The plurality of sides include at least one holder side operatively mountable against the holder and at least one outer side opposite to the holder side the outer side being non-linear, diverging from the mounting end to the cutting end and having a contour slope which increases from the mounting end to the cutting end. The tooth thereby provides a greater clearance at its mounting end, and a greater kerf at its cutting end.