How does shelf depth affect storage capacity?

Increasing shelf depth from 12 in. to 16 in. increases usable storage volume by 33% per shelf. For legal-size binders (11 in. wide), a 12 in. deep shelf requires binders to protrude 1–2 in. over the front edge, while a 16 in. deep shelf keeps them fully supported. For reference books and oversized materials, 16 in. deep shelves are recommended. OfficeFurniture2go.com carries 12 in. and 16 in. depth bookcases — call 1-800-460-0858.