Abstract: A blank is provided for the construction of a file storage box, the blank being formed from a single sheet of material, and having first and second substantially identical rectangular panels (1, 10) joined together by a third rectangular panel (8) at respective first and second fold lines (9, 11). Fourth and fifth substantially identical rectangular panels (2, 3) are joined to the first panel (1) at opposite sides thereof by third and fourth fold lines (4, 5) at right-angles to the first fold line (9). Sixth and seventh substantially identical rectangular panels (12, 13) are joined to the second panel (10) at opposite sides thereof by fifth and sixth fold lines (14, 15) at right-angles to the second fold line (11).