Blade set and hair cutting appliance

A stationary blade for a blade set of a hair cutting appliance, said blade set being arranged to be moved through hair in a moving direction to cut hair, said blade comprising

• a first wall portion arranged to serve as a skin facing wall portion during operation, and a second wall portion, each wall portion defining
• a first surface,
• a second surface facing away from the first surface, and
• at least one toothed leading edge comprising a plurality of mutually spaced apart projections provided with respective tips,
• wherein the toothed leading edge at least partially extends in a transverse direction (Y, t) relative to the moving direction assumed during operation, wherein the mutually spaced apart projections 44) at least partially extend forwardly in a longitudinal direction (X, r) approximately perpendicular to the transverse direction (Y, t),
• 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 of said blade set,
• wherein the first wall portion, at the second surface thereof, comprises a smoothed transitional region, at least at the forwardly extending projections,
• wherein the transitional region extends rearwardly from a substantially flat region of the first wall portion towards the second wall portion, thereby transitioning from the substantially flat region to respective tips of the forwardly extending projections,
• wherein the transitional region comprises a tip rounding at the teeth,
• wherein the tip rounding comprises at least a first edge rounding (Rt1) and a second edge rounding (Rt2), wherein the tip rounding is further tangentially connected to the second surface of the second wall portion, and
• wherein a ratio between the radii of the first edge rounding (Rt1) and the second edge rounding (Rt2) is greater than about 1.5:1, preferably greater than about 2:1, more preferably greater than about 2.5:1.