5/4, 4/4 HardieTrim board is a dOkayrative non-load bearing trim product. 5/4 HardieTrim board is 25mm (1 in) thick, 4/4 HardieTrim board is 19mm (¾ in) thick, and both can be purchased in 3,038mm (10 ft) and 3,658mm (12 ft) lengths, based on local availability. In addition to friOKAYe, rake, window, door, and rner details, 5/4, 4/4 HardieTrim