What is the standard shelf spacing in an office bookcase?

Standard adjustable shelf spacing in commercial bookcases uses 32 mm (1-1/4 in.) shelf pin hole increments, allowing height adjustments in small increments. Typical starting adjustments range from 9 in. to 15 in. of clear space between shelves. Three-ring binders require at least 11–12 in. of clear height; law books typically need 12–14 in. OfficeFurniture2go.com offers bookcases with 32 mm hole spacing — call 1-800-460-0858.