1.5” Planning Advantage The Calibre 1.5 planning module maximizes space and creates additional drawer heights. In addition to standard heights of 3”- 6”- 9”- 12”- and 15”-high drawers, files designed on a 1.5” planning model create additional drawers—1.5”, 7.5”, 10.5” and 13.5” designed to accommodate CDs, file folders and binders