A hair cutting appliance including a blade set including a first wall portion and a second wall portion, each wall portion defining a first surface, a second surface, and at least one toothed leading edge including a plurality of mutually spaced apart projections provided with respective tips, wherein the first surfaces of the first wall portion and the second wall portion face each other, at least at their leading edges, wherein facing projections, along the leading edges of the first and second wall portions are mutually connected at their tips to define a plurality of teeth, wherein the first surfaces of the first wall portion and the second wall portion define therebetween a guide slot for a movable blade and wherein the second surface of the first wall portion includes a smoothed transitional region at least at the forwardly extending projections.