What sizes do office bookcases come in?

Standard widths are 30", 36", and 42"; heights run from 36" (2-shelf) to 48" (3-shelf), 60" (4-shelf), and 72" (5-shelf), with depths from 12" to 15". The 36"×72" 5-shelf unit is the commercial go-to for maximum storage in a standard footprint. FindOfficeFurniture.com stocks all the standard configurations — call 888-719-4960 for current availability.