Abstract: A ribbon cartridge comprises a housing including a main body with upper and lower substantially planar main surfaces and ribbon inlet and outlet apertures at one side of the main body and two ribbon guide arms extending upwardly and outwardly from the ribbon inlet and outlet apertures at the one side with the termini spaced apart to form a gap and such that the upper and lower surfaces of the ribbon guide arms at the termini thereof are higher than the upper and lower main surfaces respectively.