The invention provides a cutting assembly (10) for cutting a sheet material (30). The cutting assembly (10) includes a cutting surface (24), and a slidable cutting means (26). The cutting surface (24) is included in or mountable on the housing (12). The cutting surface (24) has a first surface (74) and a second surface (76), with a slit (28) therebetween. One of the surfaces (74 & 76) is at an angle compared to the other. The slideable cutting means (26) has a cutting edge (37) adapted for receipt in the slit (28) when it is moved therealong.