A propeller combination comprising a forward propeller and an after propeller, said propellers being adapted to rotate in opposite directions around said axis of rotation, wherein each one of said forward propeller and said after propeller is a propeller according to the following: a propeller for a marine vessel, said propeller comprising a plurality of propeller blades (24, 26), said propeller being adapted to be rotated around an axis of rotation, each one of said propeller blades (24, 26) comprising an edge that in turn comprises a leading edge, a trailing edge and an outer edge located between said leading edge and said trailing edge, as seen along said edge of said propeller blade, wherein a transition from said leading edge to said outer edge occurs at a first transition point and a transition from said outer edge to said trailing edge occurs at a second transition point, wherein as seen in a side plane view of said propeller blade in a plane that extends parallel to said axis of rotation, a straight line from said first transition point to said second transition point coincides with said outer edge or is located at least partially outside said propeller blade, wherein a smallest distance (D 2) from said second transition point to said axis of rotation is smaller than a smallest distance (D 1) from said first transition point to said axis of rotation, wherein, as seen in said side plane view of said propeller blade, a length (L 1) of said outer edge along said axis of rotation is equal to or greater than 20 % of the maximum length (L tot) of the propeller blade along said axis of rotation, where each of the transition points is arranged at ends of the outer edge where the extension of the outer edge does not coincide with the straight line and where the edge bends off towards said axis of rotation forming one of said leading edge or said trailing edge, when seen in said plane, wherein said smallest distance (D 1) from said first transition point to said axis of rotation for said after propeller is smaller than a smallest distance (D 2) from said second transition point to said axis of rotation for said forward propeller. a propeller for a marine vessel, said propeller comprising a plurality of propeller blades (24, 26), said propeller being adapted to be rotated around an axis of rotation, each one of said propeller blades (24, 26) comprising an edge that in turn comprises a leading edge, a trailing edge and an outer edge located between said leading edge and said trailing edge, as seen along said edge of said propeller blade, wherein a transition from said leading edge to said outer edge occurs at a first transition point and a transition from said outer edge to said trailing edge occurs at a second transition point, wherein as seen in a side plane view of said propeller blade in a plane that extends parallel to said axis of rotation, a straight line from said first transition point to said second transition point coincides with said outer edge or is located at least partially outside said propeller blade, wherein a smallest distance (D 2) from said second transition point to said axis of rotation is smaller than a smallest distance (D 1) from said first transition point to said axis of rotation, wherein, as seen in said side plane view of said propeller blade, a length (L 1) of said outer edge along said axis of rotation is equal to or greater than 20 % of the maximum length (L tot) of the propeller blade along said axis of rotation, where each of the transition points is arranged at ends of the outer edge where the extension of the outer edge does not coincide with the straight line and where the edge bends off towards said axis of rotation forming one of said leading edge or said trailing edge, when seen in said plane, wherein said smallest distance (D 1) from said first transition point to said axis of rotation for said after propeller is smaller than a smallest distance (D 2) from said second transition point to said axis of rotation for said forward propeller.