A wooden smartphone case for a portable rectangular electronic device having a front surface with a display, a width, a length, and a thickness, the wooden smartphone case defines a compartment intended to receive and hold the electronic device such that the display is visible to a user, the wooden smartphone case has a longitudinal axis A along the length of the electronic device when mounted in said wooden smartphone case, the wooden smartphone case comprises: - a main body member having a first end and a second end, and comprising a back wall intended to cover a back surface of said electronic device, and opposite side walls (14, 16) running along said longitudinal axis A and having an outer height slightly larger than the thickness of the electronic device, and - a first end wall member and a second end wall member attached to said first end and said second end, respectively, of said main body member, wherein each of said first and second end wall members (18, 20) having a height corresponding to the height of said side walls (14, 16), wherein at least one of said side walls (14, 16) is structured to apply a force in a perpendicular direction with regard to a longitudinal extension of said at least one side wall (14, 16), such that an electronic device being arranged in said compartment is held in said compartment, wherein said at least one side wall (14, 16) is structured to apply said force against the electronic device arranged in said compartment along a predetermined length section of said at least one side wall (14, 16), and wherein the distance between opposite side walls in a perpendicular direction along said predetermined length section defines a first distance L1 being related to the width of said electronic device such that said first distance L1 is a predetermined percentage less than the width of said electronic device, characterized in that said at least one side wall (14, 16) is a predetermined percentage thicker at the predetermined length section in comparison to the thickness of the side wall (14, 16) not along the predetermined length section, and wherein said predetermined percentage is in the range of 10-20%, corresponding to 0.3-0.7mm, and wherein said predetermined length section of said at least one side wall (14, 16) is in the range of 20-50% of a total length of the side wall, and wherein said predetermined length section is arranged at a distance of 20-50% of the total length of the side wall from the respective first end wall member and second end wall member. - a main body member having a first end and a second end, and comprising a back wall intended to cover a back surface of said electronic device, and opposite side walls (14, 16) running along said longitudinal axis A and having an outer height slightly larger than the thickness of the electronic device, and - a first end wall member and a second end wall member attached to said first end and said second end, respectively, of said main body member, wherein each of said first and second end wall members (18, 20) having a height corresponding to the height of said side walls (14, 16), wherein at least one of said side walls (14, 16) is structured to apply a force in a perpendicular direction with regard to a longitudinal extension of said at least one side wall (14, 16), such that an electronic device being arranged in said compartment is held in said compartment, wherein said at least one side wall (14, 16) is structured to apply said force against the electronic device arranged in said compartment along a predetermined length section of said at least one side wall (14, 16), and wherein the distance between opposite side walls in a perpendicular direction along said predetermined length section defines a first distance L1 being related to the width of said electronic device such that said first distance L1 is a predetermined percentage less than the width of said electronic device, characterized in that said at least one side wall (14, 16) is a predetermined percentage thicker at the predetermined length section in comparison to the thickness of the side wall (14, 16) not along the predetermined length section, and wherein said predetermined percentage is in the range of 10-20%, corresponding to 0.3-0.7mm, and wherein said predetermined length section of said at least one side wall (14, 16) is in the range of 20-50% of a total length of the side wall, and wherein said predetermined length section is arranged at a distance of 20-50% of the total length of the side wall from the respective first end wall member and second end wall member.