What are standard bookcase heights?

Standard commercial bookcase heights include 30 in. (2-shelf), 36 in. (3-shelf), 48 in. (4-shelf), 65–66 in. (5-shelf), and 71–72 in. (6-shelf). Heights above 66 in. are considered 'full-height' units that reach near the ceiling on standard 8-ft. floors. OfficeFurniture2go.com carries all standard heights — call 1-800-460-0858.